NSA/MWR/C2 - Wet-window flag incorrectly set

The wet window flag is set high more frequently than expected.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

SGP/MWR/B4 - noisy data

The MWR exhibited occasional negative sky brightness temperatures that were resolved, 
after eliminating the instrument and communication lines as the source of the problem, by 
reformatting and reconfiguring the laptop computer.

• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)

• Mixer kinetic (physical) temperature(tkxc)

• MWR column precipitable water vapor(vap)
• 31.4 GHz sky brightness temperature(31tbsky)
• 23.8 GHz sky brightness temperature(23tbsky)
• Averaged total liquid water along LOS path(liq)

NSA/MWR/C2 - Elevated sky brightness temperatures

The MWR was providing unreasonable values of sky brightness temperatures and values of 
precipitable water vapor and liquid water path that were about 10 times larger than 
expected. The problem was corrected when the instrument was power-cycled. The cause of the 
problem is unknown.

• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz sky signal(tipsky23)

SGP/MWR/B4 - spare MWR

A spare MWR (s.n.38) was temporarily installed at Vici to help resolve problems with the 
occurance of negative sky brightness temperatures (see BCR-310 and P000712.1).

• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• lon(lon)
• lat(lat)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• 23.8 GHz sky signal(23sky)
• 23.8 GHz Blackbody signal(23bb)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody+noise injection signal(31bbn)
• 23.8 GHz noise injection brightness temperature(23unoise)
• 23.8 GHz sky+noise injection signal(23skyn)
• 31.4 GHz sky+noise injection signal(31skyn)
• 31.4 GHz sky signal(31sky)
• 31.4 GHz noise injection brightness temperature(31unoise)
• Dummy altitude for Zeb(alt)
• Actual Azimuth(actaz)
• Actual elevation angle(actel)
• Which LOS configuration(losn)
• 31.4 GHz blackbody(31bb)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Mixer kinetic (physical) temperature(tkxc)
• lat(lat)
• 23.8 GHz blackbody+noise injection signal(23bbn)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• base time(base_time)

• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• lat(lat)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• (tknd)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Actual Azimuth(actaz)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz Blackbody signal(bb23)
• Dummy altitude for Zeb(alt)
• Actual elevation angle(actel)
• 31.4 GHz blackbody(bb31)
• base time(base_time)
• lon(lon)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)

• 23.8 GHz calibration curve slope(23gain)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 23.8 GHz goodness-of-fit coefficient(23r)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(23bbn)
• 31.4 GHz noise diode calib adjusted to tknd_nom and low_pass filltered(31expave)
• 23.8 GHz blackbody signal(23tipbb)
• 31.4 GHz noise diode calib (injection temp) at Tkxc(31ndiode)
• Actual elevation angle(actel)
• 31.4 GHz sky signal+noise injection signal(31tipskynd)
• base time(base_time)
• 31.4 GHz blackbody signal(31tipbb)
• Airmass value(airm)
• Actual Azimuth(actaz)
• Dummy altitude for Zeb(alt)
• 31.4 GHz blackbody+noise injection signal(31bbn)
• Tip configuration number(tipn)
• Blackbody temperature 1(tkbb1)
• Blackbody temperature 2(tkbb2)
• 23.8 GHz Blackbody signal(23bb)
• 31.4 GHz goodness-of-fit coefficient(31r)
• 31.4 GHz calibration curve slope(31gain)
• 23.8 GHz sky signal+noise injection signal(23tipskynd)
• lat(lat)
• 23.8 GHz noise diode calib (injection temp) at Tkxc(23ndiode)
• 31.4 GHz blackbody(31bb)
• 23.8 GHz noise diode calib adjusted to tknd_nom and low_pass filltered(23expave)

• lat(lat)
• lon(lon)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Mixer kinetic (physical) temperature(tkxc)
• Dummy altitude for Zeb(alt)
• 23.8 GHz sky signal(sky23)
• base time(base_time)
• 31.4 GHz sky signal(sky31)
• 31.4 GHz blackbody(bb31)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Actual Azimuth(actaz)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Time offset of tweaks from base_time(time_offset)
• Blackbody kinetic temperature(tkbb)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)

NSA/MWR/C2 - Missing data

Data are missing and unrecoverable.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• base time(base_time)
• lat(lat)
• Mixer kinetic (physical) temperature(tkxc)
• lon(lon)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Ambient temperature(tkair)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz sky signal(sky31)
• Dummy altitude for Zeb(alt)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Time offset of tweaks from base_time(time_offset)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• IR Brightness Temperature(ir_temp)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• (tknd)
• 31.4 GHz blackbody(bb31)

• 23.8 GHz blackbody+noise injection signal(bbn23)
• Actual elevation angle(actel)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• lon(lon)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Ambient temperature(tkair)
• Actual Azimuth(actaz)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 31.4 GHz blackbody(bb31)
• (tknd)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Dummy altitude for Zeb(alt)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz Blackbody signal(bb23)
• lat(lat)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 23.8 GHz(tc23)
• base time(base_time)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)

NSA/MWR/C2 - Instrument Maintenance

Exchange of winter cover caused data corruption.

• Sky brightness temperature at 31.4 GHz(tbsky31)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz sky signal(sky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

SGP/MWR/B4/C1 - LOS cycle skipping

When MWR software version 4.12 was installed at the SGP, it was observed 
that the MWRs at CF and BF4 skip line-of-sight (LOS) observing cycles. In LOS mode, the 
software begins an observing cycle at 0, 20, and 40 seconds after the minute to provide 3 
LOS cycles per minute. If a cycle is delayed so that it takes more than 20 seconds to 
complete, then the next start time is missed, the cycle is skipped, and the data that would 
have been acquired are lost.  

It was demonstrated that the interaction with the IRT at CF slowed the MWR observing cycle 
noticeably and contributed significantly to the LOS cycle skipping. The IRT was removed 
from the MWR on 5 November 2002 and the LOS cycle skipping at the CF was resolved.  The 
IRT data are now available in a new separate datastream: sgpirtC1.a1 (and soon 
sgpirt2sC1.a1).

The BF4 cycle skipping may have resulted from a combination of an additional air 
temperature sensor on this instrument and the use of a fiber optic cable.  However, the cycle 
skipping on this instrument appears to have abated without modifications to the instrument 
configuration.

• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Blackbody kinetic temperature(tkbb)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• Averaged total liquid water along LOS path(liq)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• Ambient temperature(tkair)
• (tknd)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• 31.4 GHz sky signal(sky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz blackbody(bb31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Blackbody kinetic temperature(tkbb)
• Sky Infra-Red Temperature(sky_ir_temp)
• MWR column precipitable water vapor(vap)
• Ambient temperature(tkair)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Mixer kinetic (physical) temperature(tkxc)
• Time offset of tweaks from base_time(time_offset)
• (tknd)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)

• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• 23.8 GHz sky signal(sky23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• MWR column precipitable water vapor(vap)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• (tknd)
• Ambient temperature(tkair)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz Blackbody signal(bb23)
• Mixer kinetic (physical) temperature(tkxc)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz sky signal(sky31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz blackbody(bb31)
• Blackbody kinetic temperature(tkbb)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Averaged total liquid water along LOS path(liq)
• 23.8 GHz blackbody+noise injection signal(bbn23)

• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Ambient temperature(tkair)
• 31.4 GHz sky signal(sky31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz blackbody(bb31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• (tknd)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Blackbody kinetic temperature(tkbb)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz sky signal(sky23)
• MWR column precipitable water vapor(vap)
• Sky Infra-Red Temperature(sky_ir_temp)

SGP/MWR/B4 - Intermittent Negative Sky Brightness Temperatures

Several related and recurring problems with the SGP MWRs have been
reported dating back to 1999.  These problems were due to the
occurrence of blackbody signals (in counts) that were half of those
expected. The symptoms included noisy data (especially at Purcell),
spikes in the data (especially at Vici), negative brightness
temperatures, and apparent loss of serial communication between the
computer and the radiometer, which results in a self-termination of the
MWR program (especially at the CF).

Because these all initially appeared to be hardware-related problems,
the instrument mentor and SGP site operations personnel (1) repeatedly
cleaned and replaced the fiber optic comm. components, (2) swapped
radiometers, (3) sent radiometers back to Radiometrics for evaluation
(which has not revealed any instrument problems), and (4) reconfigured
the computer's operating system.  Despite several attempts to isolate
and correct it, the problem persisted.

It became apparent that some component of the Windows98 configuration
conflicted with the DOS-based MWR program or affected the serial port
or the contents of the serial port buffer. This problem was finally
corrected by upgrading the MWR software with a new Windows-compatible
program.

• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)

• MWR column precipitable water vapor(vap)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Averaged total liquid water along LOS path(liq)

NSA/MWR/C2 - Intermittent Negative Sky Brightness Temperatures

Several related and recurring problems with the MWRs have been reported
dating back to 1999.  These problems were due to the occurrence of
blackbody signals (in counts) that were half of those expected. The
symptoms included noisy data, spikes in the data, negative brightness
temperatures, and apparent loss of serial communication between the
computer and the radiometer, which results in a self-termination of the
MWR program.

Because these all initially appeared to be hardware-related problems,
the instrument mentor and site operations personnel (1) repeatedly
cleaned and replaced the fiber optic comm. components, (2) swapped
radiometers, (3) sent radiometers back to Radiometrics for evaluation
(which did not revealed any instrument problems), and (4) reconfigured
the computer's operating system.  Despite several attempts to isolate
and correct it, the problem persisted.

It became apparent that some component of the Windows98 configuration
conflicted with the DOS-based MWR program or affected the serial port
or the contents of the serial port buffer. This problem was finally
corrected by upgrading the MWR software with a new Windows-compatible
program.

• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

NSA/MWR/C2 - Thermally unstable

The MWR became thermally unstable during periods when the ambient temperature exceeded 
about 28C. This situation was corrected when the mixer temperature was manually increased to 
about 35C.

Data are suspect when the blackbody temperature, tkbb, exceeds 296 K.

• Sky brightness temperature at 31.4 GHz(tbsky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

SGP/MWR/B4  - min/max/delta values incorrect

The values of valid_min, valid_max, and valid_delta for fields tkxc and tknd were 
incorrect. They should be 303, 333, and 0.5 K, respectively.

• Mixer kinetic (physical) temperature(tkxc)
• (tknd)

SGP/MWR/B4 - no air temperature signal

When the new blower was upgraded by Radiometrics and reinstalled on the MWR, the air 
temperature sensor failed to properly report. It was determined that the wires carrying the 
signal to the analog board did not conform to the standard expected by the upgraded blower. 
The problem was corrected by changing the wiring and modifying the MWR software to read 
the signal from the appropriate corresponding channel.

• Ambient temperature(tkair)

• Ambient temperature(tkair)

NSA/MWR/C2 - Heater problem

The MWR heater did not appear to operate when moisture was present. The heater sensitivity 
was adjusted.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

SGP/MWR/B4 - Heater problem

The heater does not appear to be operating properly when moisture is detected. The problem 
was corrected by adjusting the heater sensivity.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

NSA/MWRP/C1 - Missing data

Data are missing and unrecoverable.

• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Derived relative humidity(relativeHumidity)
• Internal blackbody reference temperature(blackbodyTemperature)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path(liquidWaterPath)
• Ambient surface pressure(surfacePressure)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Data quality flags(dataQualityFlags)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Derived virtual temperature(virtualTemperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Equilibrium level pressure(equilibriumLevelPres)
• base time(base_time)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Array of heights for the range gates(height)
• lat(lat)
• Dummy altitude for Zeb(alt)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Interpolated dewpoint temperature(dewpointTemperature)
• azimuth(azimuth)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• elevation(elevation)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• lon(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Frequency(frequency)
• Convective Available Potential Energy(cape)
• Flag indicating moisture sensor status(wetWindowFlag)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Lifting condensation level(liftingCondensationLevel)
• Level of free convection(levelFreeConvection)
• air temperature (NGM250 predicted)(temperature)
• Ambient surface absolute temperature(surfaceTemperature)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Retrieved cloud liquid water content(liquidWaterContent)
• Time offset of tweaks from base_time(time_offset)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• time(time)
• Equilibrium level(equilibriumLevel)

NSA/C1 - Site-wide power failure

The Barrow facility experienced a site-wide power failure on 12/13.  Power was restored to 
most instruments between 2250 and 2330 GMT.

• Elevation angle of Beam 4 for WINDS data(elevation4)
• Power offset(power)
• Average Interval(avgint)
• lon(lon)
• Number of Values Required for Consensus, Beam 4(nrcns4)
• Number of values that passed consensus, beam 2(ncns2)
• Azimuth of Beam 2(azimuth2)
• Elevation angle of Beam 0 for WINDS data(elevation0)
• Beam 1 radial wind speed(vel1)
• Sample Rate(sampr)
• Rx Bandwidth Switch Code(bswitch)
• Height Index(range_gate)
• Signal to Noise Ratio, Beam 4(snr4)
• Azimuth of Beam 4 for WINDS data(azimuth4)
• Number of Values Required for Consensus, Beam 0(nrcns0)
• Number of spectra/ave int, Beam 2(nrec2)
• Signal to Noise Ratio, Beam 0(snr0)
• Azimuth of Beam 0(azimuth0)
• Array of heights for each sample time(height_p)
• Number of Values Required for Consensus, Beam 1(nrcns1)
• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• Azimuth of Beam 1(azimuth1)
• Number of valid heights(nheight)
• Oblique FFT Bandwidth(oband)
• Elevation angle of Beam 1 for WINDS data(elevation1)
• Number of Individual Spectra/Average Spectrum(nspc)
• Beam 0 radial wind speed(vel0)
• Oblique Velocity Spectral Resolution(ovsr)
• Number of values that passed consensus, beam 1(ncns1)
• Beam 4 radial wind speed(vel4)
• copolar signal to noise ratio(snr1)
• Number of Coherent Samples/spectral point(ncoh)
• Number of spectra/ave int, Beam 1(nrec1)
• Horizontal wind speed(spd)
• Elevation angle of Beam 2 for WINDS data(elevation2)
• U-component(u_wind)
• Vertical Velocity Spectral Resolution(vvsr)
• lat(lat)
• Number of values that passed consensus, beam 0(ncns0)
• V-component(v_wind)
• Height of Center of First Range Gate(rgf)
• Number of Values Required for Consensus, Beam 2(nrcns2)
• Interpulse Period(ipp)
• Number of spectra/ave int, Beam 0(nrec0)
• Number of spectra/ave int, Beam 4(nrec4)
• Beam 3 radial wind speed(vel3)
• Number of Pulse Code Bits(pcbits)
• Number of values that passed consensus, beam 4(ncns4)
• Ave snr*10 level, Beam 2(snr2)
• Elevation angle of Beam 3 for WINDS data(elevation3)
• Range Gate Spacing(rgs)
• Individual Spectrum Integration Time(sitime)
• base time(base_time)
• Height of Center of Last Range Gate(rgl)
• Number of Values Required for Consensus, Beam 3(nrcns3)
• Delay Time to 1st Gate(dly)
• Time Domain Integration Time(tditime)
• Vertical FFT Bandwidth(vband)
• Pulse Repetition Frequency(prf)
• Horizontal wind direction(dir)
• Azimuth of Beam 3 for WINDS data(azimuth3)
• Ave Time per Average Spectra.(spcavetim)
• Number of values that passed consensus, beam 3(ncns3)
• Beam 2 radial wind speed(vel2)
• Pulse Length(plen)
• Signal to Noise Ratio, Beam 3(snr3)
• Number of spectra/ave int, Beam 3(nrec3)

• JPG data stream - documentation not supported(JPEG data stream - documentation not yet available)

• lat(lat)
• Dummy altitude for Zeb(alt)
• Number of Values Required for Consensus, Beam 0(nrcns)
• Number of Values that Passed Consensus, Beam 0 Virtual Temperature(ncns_virtual_temp)
• virtual_temp_corr(virtual_temp_corr)
• base time(base_time)
• lon(lon)
• Array of heights for the range gates(height)
• Signal to Noise Ratio, Corrected Beam 0 Virtual Temperature(snr_virtual_temp_corr)
• Beam 0 virtual temperature(virtual_temp)
• Number of Values that Passed Consensus, Corrected Beam 0 Virtual Temperature(ncns_virtual_temp_corr)
• Number of pulses/ave int, Beam 0(nrec)
• Sample Rate(sampr)
• Vertical wind velocity(vert_v)
• Signal to Noise Ratio, Vertical wind velocity(snr_vert_v)
• Time offset of tweaks from base_time(time_offset)
• Signal to Noise Ratio, Beam 0 Virtual Temperature(snr_virtual_temp)
• Average Interval(avgint)
• Range Gate Spacing(rgs)
• Number of Values that Passed Consensus, Vertical wind velocity(ncns_vert_v)

• Individual Spectrum Integration Time(sitime)
• Time Domain Integration Time(tditime)
• Oblique FFT Bandwidth(oband)
• Vertical FFT Bandwidth(vband)
• Signal to Noise Ratio of the RASS Signal(snr)
• Number of valid heights(nheight)
• Radial Velocity Spectral Resolution(vsr)
• Mean atmospheric vertical velocity(mdf)
• Height of Center of Last Range Gate(rgl)
• lat(lat)
• Number of Pulse Code Bits(pcbits)
• Beam Number(beam)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Number of Coherent Samples/spectral point(ncoh)
• base time(base_time)
• Number of Individual Spectra/Average Spectrum(nspc)
• elevation(elevation)
• Rx Bandwidth Switch Code(bswitch)
• Sample Rate(sampr)
• Delay Time to 1st Gate(dly)
• Range Gate Spacing(rgs)
• Array of heights for each sample time(height_t)
• 1000 * log10(noise signal level: vert vel)(noise)
• Pulse Repetition Frequency(prf)
• Spectral Width: vert velocity(specw)
• Height Index(range_gate)
• Pulse Length(plen)
• Dummy altitude for Zeb(alt)
• Ave Time per Average Spectra. Also known as dwell.(spcavetime)
• Height of Center of First Range Gate(rgf)
• Interpulse Period(ipp)

• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• base time(base_time)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Preliminary cloud base height(preliminary_cbh)
• Laser Temperature(laser_temp)
• time(time)
• lon(lon)
• Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
• Number of laser shots recorded(shots_summed)
• Background Signal(background_signal)
• value represents date of last configuration change as yyyymmdd(property)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Voltage level which operates the thermistor(voltage_10)
• Number of laser pulses summed during measurement interval(shots_sum)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Filter Temperature(filter_temp)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Voltage level which operates the A/D card and the detector(voltage_05)
• range(range)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Laser output energy per pulse(energy_monitor)
• Array of heights for the range gates(height)
• Voltage level which operates the energy monitor(voltage_15)
• Instrument Temperature(instrument_temp)
• Angle of inclination with respect to horizontal(transceiver_altitude_angle)
• required to correct raw counts for detector deadtime prior to all other
  corrections.(deadtime_correction)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Time offset of tweaks from base_time(time_offset)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• lat(lat)
• Aerosol backscatter coefficient at 355 nm(backscatter)

• Filter Temperature(filter_temp)
• time(time)
• Laser output energy per pulse(energy_monitor)
• Laser Temperature(laser_temp)
• range(range)
• Background Signal(background_signal)
• Array of heights for the range gates(height)
• Preliminary cloud base height(preliminary_cbh)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• base time(base_time)
• Instrument Temperature(instrument_temp)
• Voltage level which operates the A/D card and the detector(voltage_05)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Voltage level which operates the energy monitor(voltage_15)
• Attenuated backscatter(detector_counts)
• Voltage level which operates the thermistor(voltage_10)
• lat(lat)
• Detector Temperature(detector_temp)
• Number of laser shots recorded(shots_summed)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Dummy altitude for Zeb(alt)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)

• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Flag indicating moisture sensor status(wetWindowFlag)
• Retrieved cloud liquid water content(liquidWaterContent)
• Dummy altitude for Zeb(alt)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Ambient surface absolute temperature(surfaceTemperature)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Lifting condensation level(liftingCondensationLevel)
• Interpolated dewpoint temperature(dewpointTemperature)
• Retrieved liquid water path(liquidWaterPath)
• Equilibrium level pressure(equilibriumLevelPres)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• lon(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• air temperature (NGM250 predicted)(temperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Retrieved water vapor density(waterVaporDensity)
• time(time)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Level of free convection pressure(levelFreeConvectionPres)
• Microwave brightness temperature(brightnessTemperature)
• Data quality flags(dataQualityFlags)
• Internal blackbody reference temperature(blackbodyTemperature)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Derived virtual temperature(virtualTemperature)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Frequency(frequency)
• base time(base_time)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• lat(lat)
• Convective Available Potential Energy(cape)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Level of free convection(levelFreeConvection)
• Ambient surface pressure(surfacePressure)
• Array of heights for the range gates(height)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• elevation(elevation)
• Time offset of tweaks from base_time(time_offset)
• Derived relative humidity(relativeHumidity)
• azimuth(azimuth)
• Equilibrium level(equilibriumLevel)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

• Time offset of tweaks from base_time(time_offset)
• Spectral Data (signal strength/freq int)(spc_amp)
• Dummy altitude for Zeb(alt)
• lon(lon)
• base time(base_time)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Array of heights for the range gates(height)
• lat(lat)
• Particle radius at logarithmic center of bin(bins)

• Mean acoustic speed(smdf)
• Dummy altitude for Zeb(alt)
• lon(lon)
• base time(base_time)
• Beam 0 virtual temperature(virtual_temp)
• Signal to Noise Ratio: acoustic(ssnr)
• Spectral Width: vert velocity(specw)
• Mean atmospheric vertical velocity(mdf)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Signal to Noise Ratio of the RASS Signal(snr)
• Array of heights for the range gates(height)
• 1000 * log10(noise signal level: vert vel)(noise)
• lat(lat)
• Acoustic Spectral Width(sspecw)
• Time offset of tweaks from base_time(time_offset)

• 40m Average QLI Reference Temperature(RefT40M_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 15 minute Present Weather Code(PwCod15mi)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Temperature(CMHTemp)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• lon(lon)
• lat(lat)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 2m Average QLI Input Voltage(Volt2M_AVG)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 10m Average Relative Humidity(RH10M_AVG)
• Present Weather Sensor Alarm(PWSAlarm)
• Dummy altitude for Zeb(alt)
• 20m Average Relative Humidity(RH20M_AVG)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 1 minute Average Visibility(AvgVis1mi)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Instant Present Weather Code(InstPwCod)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)
• 40m Average Calculated Dew Point(DP40M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 1 hour Present Weather Code(PwCod1hr)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 10m Average Calculated Dew Point(DP10M_AVG)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)
• 2m Average Temperature(T2M_AVG)
• 2m Average Calculated Dew Point(DP2M_AVG)
• Cumulative Snow Sum(CumSnow)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• 20m Average Calculated Dew Point(DP20M_AVG)
• Average X Component of Sonic Wind Speed(SonicX_AVG)
• 20m Average QLI Reference Temperature(RefT20M_AVG)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Standard Deviation of 2m Temperature(T2M_STD)
• base time(base_time)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10 minute Average Visibility(AvgVis10m)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• 20m Average Temperature(T20M_AVG)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Cumulative Water Sum(CumH2O)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• 40m Average Relative Humidity(RH40M_AVG)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 40m Average Temperature(T40M_AVG)
• Precipitation Rate(PcpRate)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Standard Deviation of 40m Temperature(T40M_STD)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• Time offset of tweaks from base_time(time_offset)
• time(time)
• 2m Average QLI Reference Temperature(RefT2M_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• 20m Average QLI Input Voltage(Volt20M_AVG)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• Datalogger Battery Voltage(Batt_Volt)
• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• Chilled Mirror Dew Point(CMHDP)
• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Atmospheric Pressure(AtmPress)

• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Hot blackbody temperature - apex(HBBapexTemp)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Number of complete (forward+backward) interferogram scans in sample average(coadditionsCount)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Version number of Operational Software(systemReleaseNumber)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Duration of scene view(sceneViewDuration)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Number of views in a sequence(sceneMirPosCount)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Observation longitude(Longitude)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Detector temperature sensed via diode near detector(detectorTemp)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Observation date(dateYYMMDD)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Time (HHMMSS)(timeHHMMSS)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Signal conditioning electronics inside air temperature(SCEtemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Scene mirror motor case temperature(mirrorMotorTemp)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Spare temperature sensor (location TBD)(spareTemp)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• lat(lat)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Observation Altitude(Altitude)
• Blackbody cavity geometry factor(BBcavityFactor)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• AERI instrument data channel number(channelNumber)
• AERI instrument unit serial number(AERIunitNumber)
• time(time)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• lon(lon)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• xxx(dataAvailable)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Number of terms used in finite field of view correction(numberOfTerms)
• Ambient blackbody temperature(ABBbottomTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Time offset of tweaks from base_time(time_offset)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Observation latitude(Latitude)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Stirling cycle cooler current(coolerCurrent)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• AERI ingest computer temperature measured at back panel of computer(computerTemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)

• lat(lat)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Julian Day including day and fraction of day(JulianDay)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• lon(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Observation latitude(Latitude)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Version number of Operational Software(systemReleaseNumber)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Wave number(wnum)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time (HHMMSS)(timeHHMMSS)
• Dummy altitude for Zeb(alt)
• BB Support Structure Temperature(BBsupportStructureTemp)
• time(time)
• Mean of radiance spectra ensemble(mean_rad)
• Duration of scene view(sceneViewDuration)
• Observation longitude(Longitude)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Observation date(dateYYMMDD)

• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Time (HHMMSS)(timeHHMMSS)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Wave number in reciprocal centimeters(wnumsum3)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Time offset of tweaks from base_time(time_offset)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• lat(lat)
• Wave number in reciprocal centimeters(wnumsum7)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Wave number in reciprocal centimeters(wnumsum6)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Wave number in reciprocal centimeters(wnumsum13)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Observation longitude(Longitude)
• xxx(dataAvailable)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Wave number in reciprocal centimeters(wnumsum2)
• Observation latitude(Latitude)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Wave number in reciprocal centimeters(wnumsum12)
• time(time)
• Wave number in reciprocal centimeters(wnumsum1)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• AERI instrument data channel number(channelNumber)
• Wave number in reciprocal centimeters(wnumsum9)
• Ambient air temperature at hatch opening(outsideAirTemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• base time(base_time)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Wave number in reciprocal centimeters(wnumsum5)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• AERI instrument unit serial number(AERIunitNumber)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Observation date(dateYYMMDD)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Version number of Operational Software(systemReleaseNumber)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Wave number in reciprocal centimeters(wnumsum11)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• lon(lon)
• Observation Altitude(Altitude)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Wave number in reciprocal centimeters(wnumsum4)
• Duration of scene view(sceneViewDuration)
• Wave number in reciprocal centimeters(wnumsum8)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• Dummy altitude for Zeb(alt)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Wave number in reciprocal centimeters(wnumsum14)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Wave number in reciprocal centimeters(wnumsum10)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Character string containing instrument name(instrumentUnitNumber)

• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz Blackbody signal(bb23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• (tknd)
• Actual Azimuth(actaz)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Blackbody kinetic temperature(tkbb)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Temperature correction coefficient at 31.4 GHz(tc31)
• base time(base_time)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Actual elevation angle(actel)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• 23.8 GHz sky signal(tipsky23)
• Ambient temperature(tkair)
• lat(lat)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Time offset of tweaks from base_time(time_offset)

• Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
• Third cloud base height(third_cbh)
• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• Flag indicating aeri retrieval status(status_flag)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Millivolts at internal ADC input (0 to 2500)(background_light)
• range(range)
• Vertical visibility(vertical_visibility)
• lon(lon)
• Degrees from vertical (0 to +90)(tilt_angle)
• Altitude of highest signal(alt_highest_signal)
• Lowest cloud base height detected.(first_cbh)
• Backscatter sum(sum_backscatter)
• lat(lat)
• Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
• Detection status. See details(detection_status)
• Warning and alarm status bits(status_string)
• 6 character string describing instrument measurement parameters(measurement_parameters)
• base time(base_time)
• Second lowest cloud base height(second_cbh)
• Laser temperature(laser_temperature)
• GPS raw data filename(filename)
• Millivolts at internal ADC input(window_contamination)

• Number of valid heights(nheight)
• Rx Bandwidth Switch Code(bswitch)
• Range Gate Spacing(rgs)
• Ave Time per Average Spectra.(spcavetim)
• Delay Time to 1st Gate(dly)
• elevation(elevation)
• Spectral Data (signal strength/freq int)(spc_amp)
• Interpulse Period(ipp)
• Radial Velocity Spectral Resolution(vsr)
• lon(lon)
• Height of Center of Last Range Gate(rgl)
• Time offset of tweaks from base_time(time_offset)
• Time Domain Integration Time(tditime)
• base time(base_time)
• Vertical FFT Bandwidth(vband)
• Sample Rate(sampr)
• Height of Center of First Range Gate(rgf)
• Dummy altitude for Zeb(alt)
• Pulse Repetition Frequency(prf)
• Array of heights for each sample time(height_t)
• Oblique FFT Bandwidth(oband)
• Number of Pulse Code Bits(pcbits)
• Number of Coherent Samples/spectral point(ncoh)
• Number of Individual Spectra/Average Spectrum(nspc)
• Individual Spectrum Integration Time(sitime)
• Particle radius at logarithmic center of bin(bins)
• Height Index(range_gate)
• lat(lat)
• Beam Number(beam)
• Pulse Length(plen)

• IR Brightness Temperature(ir_temp)
• Ambient temperature(tkair)
• MWR column precipitable water vapor(vap)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• base time(base_time)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz blackbody(bb31)
• 31.4 GHz sky signal(sky31)
• Dummy altitude for Zeb(alt)
• (tknd)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Actual Azimuth(actaz)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz Blackbody signal(bb23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Averaged total liquid water along LOS path(liq)
• lat(lat)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Actual elevation angle(actel)
• Sky Infra-Red Temperature(sky_ir_temp)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 31.4 GHz(tc31)

• Wave number(wnum)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time offset of tweaks from base_time(time_offset)
• Version number of Operational Software(systemReleaseNumber)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• time(time)
• base time(base_time)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Dummy altitude for Zeb(alt)
• Time (HHMMSS)(timeHHMMSS)
• lon(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Observation longitude(Longitude)
• Character string containing instrument name(instrumentUnitNumber)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• AERI instrument unit serial number(AERIunitNumber)
• Julian Day including day and fraction of day(JulianDay)
• lat(lat)
• Mean of radiance spectra ensemble(mean_rad)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Observation date(dateYYMMDD)
• Duration of scene view(sceneViewDuration)
• Observation latitude(Latitude)

• Delay to First Range Gate(StartGateDelay)
• Time offset of tweaks from base_time(time_offset)
• Receiver Cal Time Stamp(RxCalTimeStamp)
• Number of Coherent Integrations(NumCoherentIntegrations)
• Max. height of clutter removal(ClutterHeight)
• Circular Depolarization Ratio(CircularDepolarizationRatio)
• DC Filtering ON-OFF Status(DCFilterONOFF)
• Average Noise Level (S/N<0)(AvgNoiseLevel)
• Pulse Width(PulseWidth)
• Current Receiver Number(ReceiverNumber)
• Receiver Gain(RxGain)
• RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
• Windowing ON-OFF Status(WindowingONOFF)
• MMCR Spectral Width(SpectralWidth)
• Gate Spacing(GateSpacing)
• Mean Noise Level(NoiseLevel)
• Receiver 290K Level(Rx290KLevel)
• Number of Receiver(NumReceivers)
• Minimum detectable reflectivity(MinimumDetectableReflectivity)
• TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
• MMCR Reflectivity(Reflectivity)
• Receiver Cal Check Level(CalCheckLevel)
• Receiver Cal Check Time Stamp(CalCheckTime)
• Number of Code Bits(NumCodeBits)
• lon(lon)
• Inter-Pulse Period(InterPulsePeriod)
• Range Corrected Calibrated Power(RangeCorrectedPower)
• Dummy altitude for Zeb(alt)
• Receiver Sky Noise(SkyNoiseLevel)
• Time associated with hourly averaged values(TimeAvg)
• Data Quality Status(DataQualityStatus)
• lat(lat)
• Operating Set for this Record(ModeNum)
• Radar Constant(RadarConstant)
• radar mode char identifier(ModeDescription)
• Power (uncalibrated)(Power)
• Receiver Mode(ReceiverMode)
• Number of Spectral Averages(NumSpectralAverages)
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• base time(base_time)
• Number of Gate Heights(NumHeights)
• Number of Points in FFT(NumFFT)
• Array of heights for each power(heights)
• Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
• time(time)
• Signal to Noise Ratio(SignalToNoiseRatio)

NSA/MWR/C2 - no air temperature signal

When the new blower was upgraded by Radiometrics and reinstalled on the MWR, the air 
temperature sensor failed to properly report. It was determined that the wires carrying the 
signal to the analog board did not conform to the standard expected by the upgraded blower. 
The problem was corrected by modifying the MWR software to read the signal from the 
appropriate corresponding channel.

• Ambient temperature(tkair)

• Ambient temperature(tkair)

SGP/MWR/B4 - Reprocess: Revised Retrieval Coefficients

IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable 
water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were 
based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant 
(1957) liquid water absorption model.

Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz 
(1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption 
model were developed.  The Rosenkranz water vapor absorption model resulted a 2 percent 
increase in PWV relative to the earlier Liebe and Layton model.  The Liebe liquid water 
absorption model decreased the LWP by 10% relative to the Grant model.  However, the 
increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was 
particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA).

Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, 
pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN 
compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in 
Rosenkranz (1998), provided a better fit to the microwave brightness temperature 
measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. 
Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which 
utilizes the HITRAN compilation for its spectroscopic parameters.  These new retrievals 
provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on 
Rosenkranz (1998).

Although the MWR data will be reprocessed to apply the new monortm-based retrievals, for 
most purposes it will be sufficient to correct the data using the following factors:

PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ
LWP_MONORTM = 1.026  * LWP_ROSENKRANZ

The Rosenkranz-based retrieval coefficients became active at SGP.B4 20020415.2300.  The 
MONORTM-based retrieval coefficients became active at SGP.B4 20050624.2100.

Note: a reprocessing effort is already underway to apply the Rosenkranz-based retrieval 
coefficients to all MWR prior to April 2002.  An additional reprocessing task will be 
undertaken to apply the MONORTM retrieval to all MWR data when the first is completed. Read 
reprocessing comments in the netcdf file header carefully to ensure you are aware which 
retrieval is in play.

• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

• Ensemble average for MWR vapor in window centered about balloon release(mean_vap_mwr)
• Ensemble average for MWR liquid in window centered about balloon release(mean_liq_mwr)

• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

• MWR column precipitable water vapor(vap)
• Averaged total liquid water along LOS path(liq)

NSA/MWR/C2 - Reprocessed: Revised Retrieval Coefficients

IN THE BEGINNING (June 1992), the retrieval coefficients used to derive 
the precipitable water vapor (PWV) and liquid water path (LWP) from the 
MWR brightness temperatures were based on the Liebe and Layton (1987) 
water vapor and oxygen absorption model and the Grant (1957) liquid 
water absorption model.

Following the SHEBA experience, revised retrievals based on the more 
recent Rosenkranz (1998) water vapor and oxygen absorption models and 
the Liebe (1991) liquid water absorption model were developed.  The 
Rosenkranz water vapor absorption model resulted a 2 percent increase 
in PWV relative to the earlier Liebe and Layton model.	The Liebe 
liquid water absorption model decreased the LWP by 10% relative to the 
Grant model.  However, the increased oxygen absorption caused a 
0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly 
significant for low LWP conditions (i.e. thin clouds encountered at 
SHEBA).

Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and 
Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 
22 GHz water vapor line from the HITRAN compilation, which is 5 percent 
smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz 
(1998), provided a better fit to the microwave brightness temperature 
measurements at 5 frequencies in the range 22-30 GHz, and yielded more 
accurate retrievals. Accordingly, revised MWR retrieval coefficients 
have been developed using MONORTM, which utilizes the HITRAN compilation 
for its spectroscopic parameters.  These new retrievals provide 3 
percent less PWV and 2.6 percent greater LWP than the previous 
retrievals based on Rosenkranz (1998).

The Rosenkranz-based retrieval coefficients became active at NSA.C2
20020418.1700.	The MONORTM-based retrieval coefficients became active 
at NSA.C2 20050629.0000.

Note: The NSA.C2 MWRLOS data for 19991018-20050630 have been reprocessed
to apply the MONORTM-based retrievals for all time. The reprocessed data
were archived in March 2007.  The TIP data have not been reprocessed.

• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)

NSA/MWRP/C1 - Blower assembly failure

The MWRP had a problem with the ambient temperature sensor situated in the blower 
assembly. This caused corrupted data files and software crashes. The blower assembly was removed 
and sent to the vendor for repair on 9/21, and re-installed on 10/12.

• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Derived relative humidity(relativeHumidity)
• Retrieved liquid water path(liquidWaterPath)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Internal blackbody reference temperature(blackbodyTemperature)
• Ambient surface pressure(surfacePressure)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Data quality flags(dataQualityFlags)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Derived virtual temperature(virtualTemperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Equilibrium level pressure(equilibriumLevelPres)
• Array of heights for the range gates(height)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• azimuth(azimuth)
• Interpolated dewpoint temperature(dewpointTemperature)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• elevation(elevation)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Frequency(frequency)
• Convective Available Potential Energy(cape)
• Flag indicating moisture sensor status(wetWindowFlag)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Lifting condensation level(liftingCondensationLevel)
• Level of free convection(levelFreeConvection)
• air temperature (NGM250 predicted)(temperature)
• Ambient surface absolute temperature(surfaceTemperature)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Retrieved cloud liquid water content(liquidWaterContent)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Equilibrium level(equilibriumLevel)

SGP/MWR/B4 - New software version (4.15) installed

A problem began with the installation of MWR.EXE version 4.12 in July 2002. The software 
had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one that 
caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip 
curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these 
problems.

The new MWR software, version 4.15, was installed on 9/13/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.

• Averaged total liquid water along LOS path(liq)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz blackbody(bb31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Ambient temperature(tkair)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• (tknd)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• IR Brightness Temperature(ir_temp)
• 31.4 GHz sky signal(sky31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)

• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz Blackbody signal(bb23)
• (tknd)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(tipsky23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Ambient temperature(tkair)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

NSA/MWR/C2 - New software version (4.15) installed

A problem began with the installation of MWR.EXE version 4.12 in September 2002. The 
software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one 
that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of 
tip curves, and saturation of CPU usage.  Software versions 4.13 and 4.14 also produced 
these problems.

The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.

• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• IR Brightness Temperature(ir_temp)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Ambient temperature(tkair)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• (tknd)
• 31.4 GHz sky signal(sky31)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)

• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Ambient temperature(tkair)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky signal(tipsky23)
• Mixer kinetic (physical) temperature(tkxc)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 31.4 GHz blackbody(bb31)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Blackbody kinetic temperature(tkbb)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz Blackbody signal(bb23)
• Temperature correction coefficient at 31.4 GHz(tc31)

NSA/MWR/C2 - Frosting/Condensation

Doug reported freezing winds and ice accumulation on the MWR cover and radome. This may 
affect data quality and calibration. 
On 2/24 Doug attempted to slowly thaw the cover and clear the window.
From 2/22 to 2/24 the LWP and PWV reported by the MWR are near zero. These data are 
probably affected by the frost accumulated on the radiometer window.

• Sky brightness temperature at 31.4 GHz(tbsky31)
• lon(lon)
• 23.8 GHz sky signal(sky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

• null(Raw data stream - documentation not supported)

• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky signal(tipsky23)

NSA/MWRP/C1 - Incorrect calibration

On 4/12 a calibration was attempted but the calibration was not successful. A new 
calibration was completed on 4/13 20:00 UTC.  Data between the two calibration attempts are 
incorrect and should be disregarded.

• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Derived relative humidity(relativeHumidity)
• Internal blackbody reference temperature(blackbodyTemperature)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path(liquidWaterPath)
• Ambient surface pressure(surfacePressure)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Data quality flags(dataQualityFlags)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Derived virtual temperature(virtualTemperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Equilibrium level pressure(equilibriumLevelPres)
• base time(base_time)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Array of heights for the range gates(height)
• lat(lat)
• Dummy altitude for Zeb(alt)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Interpolated dewpoint temperature(dewpointTemperature)
• azimuth(azimuth)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• elevation(elevation)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• lon(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Frequency(frequency)
• Convective Available Potential Energy(cape)
• Flag indicating moisture sensor status(wetWindowFlag)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Lifting condensation level(liftingCondensationLevel)
• Level of free convection(levelFreeConvection)
• air temperature (NGM250 predicted)(temperature)
• Ambient surface absolute temperature(surfaceTemperature)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Retrieved cloud liquid water content(liquidWaterContent)
• Time offset of tweaks from base_time(time_offset)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• time(time)
• Equilibrium level(equilibriumLevel)

SGP/MWR/B4 - Reprocess: wrong retrievals

When the computer and core configuration were upgraded, retrieval coefficients for BF1 
were accidently included in the configuration file.
The correct coefficients for BF4 were applied when the software was upgraded to ver. 4.14 
and the configuration file was updated.

• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)

• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

• Ensemble average for MWR vapor in window centered about balloon release(mean_vap_mwr)
• Ensemble average for MWR liquid in window centered about balloon release(mean_liq_mwr)

• MWR column precipitable water vapor(vap)
• Averaged total liquid water along LOS path(liq)

NSA/MWRP/C1 - Bad calibration values

After calibration was completed on 4/26/2006 the last value in the V-band calibration file 
was corrupted. V-band data are wrong between 4/26 19:30 and 4/27 15:27 when the 
corrupted values were removed.

• Raw data stream - documentation not supported(raw)

• Derived relative humidity(relativeHumidity)
• Retrieved water vapor density(waterVaporDensity)
• Interpolated dewpoint temperature(dewpointTemperature)
• air temperature (NGM250 predicted)(temperature)
• Cloud base height(cloudBaseHeight)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

• Raw data stream - documentation not supported(raw)

SGP/MWR/C1 - Spikes in ambient temperature readings

There are intermittent spikes in the Tkair temperature (T ~ 400 K). On 7/28 the sensor 
was cleaned and the instrument power cycled following a power outage. Readings came back to 
normal.

• Ambient temperature(tkair)

• Ambient temperature(tkair)

NSA/MWR/C1 - TKAIR sensor failure

Between 7/14 and 7/28 the tkair variable is missing most of the time and sometimes has 
large negative spikes.  On 7/28, the sensor was cleaned of corrosion and the readings came 
back to normal.

• Ambient temperature(tkair)

SGP/MWR/B5 - Mixer temp unstable

The radiometer mixer temperature was unstable during this time interval. The instability 
will slightly affect calibration.  On 8/21, the instrument was sent to the vendor for 
repair.

June and July data are suspect, the calibration may be slightly incorrect. August data 
should not be used.

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz sky signal(tipsky31)
• (tknd)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• 31.4 GHz goodness-of-fit coefficient(r31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 23.8 GHz sky signal(tipsky23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 23.8 GHz sky signal(sky23)
• MWR column precipitable water vapor(vap)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• (tknd)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz sky signal(sky31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)

SGP/MWR/B1 - Reprocessed: Corrected calibration

The radiometer was thermally unstable. Calibration coefficients for the time interval were 
re-derived after screening for bad values of TKxc and the data were reprocessed.  
Reprocessed MWRLOS data were archived January 2007.  MWRTIP data will not be reprocessed.

• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz goodness-of-fit coefficient(r31)

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• (tknd)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• MWR column precipitable water vapor(vap)

• null(Raw data stream - documentation not supported)

SGP/MWR/B6 - Reprocessed: Corrected calibration

The instrument was overheating so the radiometer temperature set point was increased from 
52 C to 56.5 C. The period between 7/20 and 7/22 has been reprocessed with corrected 
calibration coefficients.  Reprocessed MWRLOS data were archived January 2007.  MWRTIP data 
will not be reprocessed.

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Actual Azimuth(actaz)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• base time(base_time)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

SGP/MWR/B6 - Reprocessed: Corrected calibration

The instrument was overheating so the radiometer temperature set point was increased from 
56.3 C to 57.8 C.  The data have been reprocessed with corrected calibration 
coefficients.  Reprocessed MWRLOS data were archived January 2007.  MWRTIP data will not be 
reprocessed.

• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• (tknd)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)

NSA/MWR/C2 - Spikes in air temperature readings

The tkair variable has occasional spikes due to sensor corrosion. On 8/1, the temperature 
sensor was replaced.

• Ambient temperature(tkair)

SGP/MWR/B1 - Missing data

Data are missing in this time period.

• Ambient temperature(tkair)
• IR Brightness Temperature(ir_temp)
• Averaged total liquid water along LOS path(liq)
• lon(lon)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• lat(lat)
• 31.4 GHz sky signal(sky31)
• (tknd)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• base time(base_time)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Dummy altitude for Zeb(alt)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 23.8 GHz sky signal(sky23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• 23.8 GHz Blackbody signal(bb23)

• Blackbody kinetic temperature(tkbb)
• Actual elevation angle(actel)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Actual Azimuth(actaz)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• lat(lat)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Time offset of tweaks from base_time(time_offset)
• (tknd)
• Ambient temperature(tkair)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz sky signal(tipsky31)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz blac2body+noise injection signal(bbn31)

SGP/MWR/B6 - Data missing

Data are missing because of computer problem and power outage at the site.

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Actual Azimuth(actaz)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• base time(base_time)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

SGP/MWR/C1 - Missing data

Data are missing because of a SW problem

• 31.4 GHz blac2body+noise injection signal(bbn31)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• (tknd)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Actual elevation angle(actel)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz Blackbody signal(bb23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• lat(lat)
• Ambient temperature(tkair)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Dummy altitude for Zeb(alt)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Actual Azimuth(actaz)
• base time(base_time)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• lon(lon)
• 23.8 GHz sky signal(tipsky23)
• Time offset of tweaks from base_time(time_offset)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• 23.8 GHz goodness-of-fit coefficient(r23)

• 31.4 GHz sky signal(sky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Dummy altitude for Zeb(alt)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• lon(lon)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Blackbody kinetic temperature(tkbb)
• Sky Infra-Red Temperature(sky_ir_temp)
• MWR column precipitable water vapor(vap)
• Ambient temperature(tkair)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Mixer kinetic (physical) temperature(tkxc)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• (tknd)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• lat(lat)

SGP/MWR/B5 - Radiometer removed for repairs

The radiometer was removed for repairs

• Actual Azimuth(actaz)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz Blackbody signal(bb23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Ambient temperature(tkair)
• 23.8 GHz sky signal(tipsky23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• lat(lat)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz sky signal(tipsky31)
• (tknd)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• lon(lon)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Actual elevation angle(actel)
• Time offset of tweaks from base_time(time_offset)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• base time(base_time)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Dummy altitude for Zeb(alt)

• Mixer kinetic (physical) temperature(tkxc)
• Ambient temperature(tkair)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Time offset of tweaks from base_time(time_offset)
• Blackbody kinetic temperature(tkbb)
• IR Brightness Temperature(ir_temp)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• lat(lat)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Dummy altitude for Zeb(alt)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• base time(base_time)
• 23.8 GHz sky signal(sky23)
• MWR column precipitable water vapor(vap)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• (tknd)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• lon(lon)
• 31.4 GHz sky signal(sky31)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz Blackbody signal(bb23)

NSA/MWR/C2 - Radiometer removed for repairs

The radiometer was removed and sent to the vendor for repairs.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• base time(base_time)
• lat(lat)
• Mixer kinetic (physical) temperature(tkxc)
• lon(lon)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Ambient temperature(tkair)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz sky signal(sky31)
• Dummy altitude for Zeb(alt)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Time offset of tweaks from base_time(time_offset)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• IR Brightness Temperature(ir_temp)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• (tknd)
• 31.4 GHz blackbody(bb31)

• null(Raw data stream - documentation not supported)

• 23.8 GHz blackbody+noise injection signal(bbn23)
• Actual elevation angle(actel)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• lon(lon)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Ambient temperature(tkair)
• Actual Azimuth(actaz)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 31.4 GHz blackbody(bb31)
• (tknd)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Dummy altitude for Zeb(alt)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz Blackbody signal(bb23)
• lat(lat)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 23.8 GHz(tc23)
• base time(base_time)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)

SGP/MWR/B6 - Computer problem

The computer was found powered off several times and the operators were unable to reboot 
it remotely

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Actual Azimuth(actaz)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• base time(base_time)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

NSA/MWRP/C1 - Reprocessed: Re-calibration

After being re-installed the radiometer was calibrated with liquid nitrogen.
Data between 8/8 and 9/6 have been reprocessed to apply the revised calibrations.

• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Internal blackbody reference temperature(blackbodyTemperature)
• Retrieved liquid water path(liquidWaterPath)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Derived virtual temperature(virtualTemperature)
• Equilibrium level pressure(equilibriumLevelPres)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Interpolated dewpoint temperature(dewpointTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Convective Available Potential Energy(cape)
• Microwave brightness temperature(brightnessTemperature)
• Lifting condensation level(liftingCondensationLevel)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Level of free convection(levelFreeConvection)
• Retrieved cloud liquid water content(liquidWaterContent)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Equilibrium level(equilibriumLevel)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

SGP/MWR/B1 - Radiometer removed for IOP

On 9/20 the radiometer was removed and shipped to the SGP Central Facility for the 
MWR-intercomparison IOP. Datastream from this radiometer will be available as IOP data under the 
facility name S01.

• Ambient temperature(tkair)
• IR Brightness Temperature(ir_temp)
• Averaged total liquid water along LOS path(liq)
• lon(lon)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• lat(lat)
• 31.4 GHz sky signal(sky31)
• (tknd)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• base time(base_time)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Dummy altitude for Zeb(alt)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 23.8 GHz sky signal(sky23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• 23.8 GHz Blackbody signal(bb23)

• Blackbody kinetic temperature(tkbb)
• Actual elevation angle(actel)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Actual Azimuth(actaz)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• lat(lat)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Time offset of tweaks from base_time(time_offset)
• (tknd)
• Ambient temperature(tkair)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz sky signal(tipsky31)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz blac2body+noise injection signal(bbn31)

• null(Raw data stream - documentation not supported)

SGP/MWR/B6 - Computer failure; Data missing

The computer powered off and it was not possible to restart it remotely. Data are missing 
between 9/8 and 9/12.

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Actual Azimuth(actaz)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• null(Raw data stream - documentation not supported)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• base time(base_time)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

• Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
• Dummy altitude for Zeb(alt)
• Standard deviation about the mean for the total liquid water amount(liq_sdev)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
• 23.8 GHz sky brightness temperature(23tbsky)
• Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
• 31.4 GHz sky brightness temperature(31tbsky)
• Number of points included in the ir_temp ensemble(num_obs_irt)
• Standard deviation about the mean for the total water vapor amount(vap_sdev)
• Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Number of data points averaged for ir_temp(num_obs_ir)
• IR Brightness Temperature(ir_temp)
• lon(lon)
• base time(base_time)
• Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
• Averaged total liquid water along LOS path(liq)
• Number of data points averaged for 23tbsky, 31tbsky, vap & liq(num_obs)
• MWR column precipitable water vapor(vap)
• Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)

SGP/MWR/B6 - Radiometer removed for MWR inter-comparison IOP

The radiometer was removed and taken to the Central Facility for the MWR inter-comparison 
IOP. Data from this instrument will be available from the IOP section as datastream S03

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Actual Azimuth(actaz)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• null(Raw data stream - documentation not supported)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• base time(base_time)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

• Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
• Dummy altitude for Zeb(alt)
• Standard deviation about the mean for the total liquid water amount(liq_sdev)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
• 23.8 GHz sky brightness temperature(23tbsky)
• Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
• 31.4 GHz sky brightness temperature(31tbsky)
• Number of points included in the ir_temp ensemble(num_obs_irt)
• Standard deviation about the mean for the total water vapor amount(vap_sdev)
• Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Number of data points averaged for ir_temp(num_obs_ir)
• IR Brightness Temperature(ir_temp)
• lon(lon)
• base time(base_time)
• Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
• Averaged total liquid water along LOS path(liq)
• Number of data points averaged for 23tbsky, 31tbsky, vap & liq(num_obs)
• MWR column precipitable water vapor(vap)
• Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)

NSA/MWR/C1 - Rain sensor always on

The rain sensor was always on between 10/5 and 10/23 2006.
The user should be aware that not all data flagged as rainy are actually rainy. The 
problem was caused by a shift in the sensitivity of the rain sensor and was corrected by 
changing the sensor threshold in the configuration file.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

NSA/MWRP/C1 - Reprocessed: K-Band calibration drift

At the beginning of November, the K-band channel calibration started to drift. The MWRP 
brightness temperatures were about 1.5 K higher than the MWR-measured brightness 
temperatures. By the half of the month the differences were more than 2 K to become about 4 K by 
the end of November. On Nov 27 new calibration coefficients were derived and uploaded.

Data for 20061101-20061127 have been reprocessed with the revised calibrations and are 
available from the ARM Archive effective January 2007.

• Lifting condensation level pressure(liftingCondensationLevelPres)
• Derived relative humidity(relativeHumidity)
• Retrieved liquid water path(liquidWaterPath)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Convective Available Potential Energy(cape)
• Microwave brightness temperature(brightnessTemperature)
• Lifting condensation level(liftingCondensationLevel)
• Level of free convection(levelFreeConvection)
• Interpolated dewpoint temperature(dewpointTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Retrieved cloud liquid water content(liquidWaterContent)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

SGP/MWR/C1 - Instrument testing

On 11/28 the insrument was removed and taken inside for testing

• 31.4 GHz blac2body+noise injection signal(bbn31)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• (tknd)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Actual elevation angle(actel)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz Blackbody signal(bb23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• lat(lat)
• Ambient temperature(tkair)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Dummy altitude for Zeb(alt)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Actual Azimuth(actaz)
• base time(base_time)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• lon(lon)
• 23.8 GHz sky signal(tipsky23)
• Time offset of tweaks from base_time(time_offset)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• 23.8 GHz goodness-of-fit coefficient(r23)

• 31.4 GHz sky signal(sky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Dummy altitude for Zeb(alt)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• lon(lon)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Blackbody kinetic temperature(tkbb)
• Sky Infra-Red Temperature(sky_ir_temp)
• MWR column precipitable water vapor(vap)
• Ambient temperature(tkair)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Mixer kinetic (physical) temperature(tkxc)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• (tknd)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• lat(lat)

• null(Raw data stream - documentation not supported)

SGP/MWR/E14 - Radiometer testing

The radiometer was removed and taken inside for testing

• null(Raw data stream - documentation not supported)

• (tknd)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.4 GHz sky signal(tipsky31)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lat(lat)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Dummy altitude for Zeb(alt)
• lon(lon)
• Actual elevation angle(actel)
• Actual Azimuth(actaz)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz Blackbody signal(bb23)
• Ambient temperature(tkair)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz blackbody+noise injection signal(bbn23)

• Dummy altitude for Zeb(alt)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky Infra-Red Temperature(sky_ir_temp)
• (tknd)
• lat(lat)
• lon(lon)
• 23.8 GHz sky signal(sky23)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Ambient temperature(tkair)
• Time offset of tweaks from base_time(time_offset)
• 31.4 GHz sky signal(sky31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• 31.4 GHz blackbody(bb31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

NSA/MWRP/C1 - Incorrect surface measurements

Surface measurements are spiking and not comparing well with the co-located METTWR 
measurements.

On 2/13 site operators cleaned a filter in the heater housing resolving the problem.

• Ambient surface pressure(surfacePressure)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Ambient surface absolute temperature(surfaceTemperature)
• Ambient surface relative humidity(surfaceRelativeHumidity)

SGP/MWR/C1/E14 - Freezing rain-Incorrect rain flag

Between 01/12 and 01/15 brightness temperatures show high values (Tb > 100 K) indicative 
of rain, however the wet_window flag is 0 (indicative of no rain). During that time there 
where freezing conditions with ice pellets that were not detected by the sensor. The high 
brightness temperatures may be due to melting ice on the window.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

SGP/MWRHF/C1 - 90-GHz questionable calibration

Between 20061103 and 20070301 one of the parameters thresholds used to select good tip 
curves used in the calibratio process was not optimal. This resulted in data that have a 
high standard deviation and a unsatisfactory agreement with model computations.
After collecting enough points needed to conduct a model comparison the threshold was 
changed on March 1.
From a limited data analysis for the month pf March it appears that the change in 
threshold has improved the agreement between measurements and the model.

• Sky brightness temperature (90 GHz)(tbsky90)

SGP/MWRHF/C1 - 150-Ghz channel not working

Starting on 2/23 the 150-Ghz channel is showing a temperature of 310 K. The suspected 
cause of the problem is a hardware failure. The instrument was removed and sent for repair on 
4/2

• Sky brightness temperature (150 GHz)(tbsky150)

SGP/MWR/E14 - Power supply failure

On 3/20 the instrument suffered a power supply failure and was removed for repairs

• (tknd)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.4 GHz sky signal(tipsky31)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lat(lat)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Dummy altitude for Zeb(alt)
• lon(lon)
• Actual elevation angle(actel)
• Actual Azimuth(actaz)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz Blackbody signal(bb23)
• Ambient temperature(tkair)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz blackbody+noise injection signal(bbn23)

• Dummy altitude for Zeb(alt)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• MWR column precipitable water vapor(vap)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky Infra-Red Temperature(sky_ir_temp)
• (tknd)
• lat(lat)
• lon(lon)
• 23.8 GHz sky signal(sky23)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Ambient temperature(tkair)
• Time offset of tweaks from base_time(time_offset)
• 31.4 GHz sky signal(sky31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• 31.4 GHz blackbody(bb31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

NSA/MWRP/C1 - Incorrect surface measurements

The MWRP surface temperature and pressure readings were in disagreement with those from 
other instruments. The possible cause of the disagreement was ice buildup around the 
sensors.  Readings returned to normal March 29.

The temperature readings were more affected. Since the readings are erratic, with large 
oscillations, it is not possible to correct them. Disregard the surface temperature and 
humidity readings during this time. The wrong readings will affect the first layer of the 
temperature and humidity profiles as well.

• Ambient surface pressure(surfacePressure)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Ambient surface absolute temperature(surfaceTemperature)
• Ambient surface relative humidity(surfaceRelativeHumidity)

FKB/MWRP/M1 - Reprocess: Incorrect calibration

The software was started with the wrong calibration data.

• Derived relative humidity(relativeHumidity)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Retrieved water vapor density(waterVaporDensity)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Level of free convection pressure(levelFreeConvectionPres)
• Lifting condensation level(liftingCondensationLevel)
• air temperature (NGM250 predicted)(temperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Level of free convection(levelFreeConvection)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Microwave brightness temperature(brightnessTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Retrieved liquid water path(liquidWaterPath)
• Lifting condensation level pressure(liftingCondensationLevelPres)

NSA/MWRP/C1 - Reprocessed: 6-channel retrieval replaced by 5-channel retrieval

Due to repeated failure of the V-band receiver and calibration problems, the 6-channel 
retrieval was retired and a new 5-channel retrieval which uses only the K-band channels was 
implemented.

All data previously processed with the 6-channel retrieval have been reprocessed.

Please note that the 7 channels (brightness temperatures) in the V-band range (51 to 60 
GHz) should not be used.  See D080331.1 and D080331.2.

• Retrieved liquid water path(liquidWaterPath)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Microwave brightness temperature(brightnessTemperature)

SGP/MWR/C1 - Noisy data

Since 7/14 the MWR is experiencing intermittent periods of increased noise. The cause for 
this is under investigation.

• 31.4 GHz blac2body+noise injection signal(bbn31)
• 31.4 GHz blackbody(bb31)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz sky signal(tipsky31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• 23.8 GHz Blackbody signal(bb23)

• Sky brightness temperature at 31.4 GHz(tbsky31)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• 31.4 GHz sky signal(sky31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz blackbody(bb31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• MWR column precipitable water vapor(vap)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 23.8 GHz sky signal(sky23)

FKB/MWRHF/M1 - Dew formation on window

During night time, when the humidity is very high (RH ~ 100%) data are strongly affected 
by dew formation on the window. 
This results in a smooth and large (80-150 K) increase of the brightness temperature from 
early night to sunrise. Data are affected mostly at night.

• Sky brightness temperature (90 GHz)(tbsky90)
• Sky brightness temperature (150 GHz)(tbsky150)

FKB/MWRHF/M1 - Reprocess: Surface Relative Humidity too low

The surface relative humidity readings are too low when compared with the MWRP and the 
tower sensor.

• Relative humidity inside the instrument enclosure(rh)

FKB/MWRP/M1 - LN2 Calibration-

Between 1100 and 1500 there were two calibration attempts.

• Dummy altitude for Zeb(alt)
• Ambient surface absolute temperature(surfaceTemperature)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• lon(lon)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• Convective Available Potential Energy(cape)
• Equilibrium level(equilibriumLevel)
• air temperature (NGM250 predicted)(temperature)
• Derived virtual temperature(virtualTemperature)
• Frequency(frequency)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Flag indicating moisture sensor status(wetWindowFlag)
• Retrieved liquid water path(liquidWaterPath)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• elevation(elevation)
• Data quality flags(dataQualityFlags)
• Derived relative humidity(relativeHumidity)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• lat(lat)
• Lifting condensation level(liftingCondensationLevel)
• Cloud base height(cloudBaseHeight)
• Internal blackbody reference temperature(blackbodyTemperature)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Time offset of tweaks from base_time(time_offset)
• azimuth(azimuth)
• base time(base_time)
• time(time)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Level of free convection(levelFreeConvection)
• Interpolated dewpoint temperature(dewpointTemperature)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Microwave brightness temperature(brightnessTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Ambient surface pressure(surfacePressure)
• Equilibrium level pressure(equilibriumLevelPres)
• Array of heights for the range gates(height)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)

SGP/MWR/B6 - Incorrect rain flag

The rain flag indicator is coming up too often. On 9/11 the SGP technicians checked and 
adjusted the rain sensor sensitivity. The operation seemed successful, bu on 9/18 the flag 
indicator came back up and stayed on too much since.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

FKB/MWRP/M1 - Reprocess: Updated 30-GHz calibration coefficient

On 9/17 the instrument was calibrated with liquid nitrogen. For the 30-GHz channel the 
results of calibration were not optimal and were causing a negative bias in the retrieved 
LWP.

On 10/9 the 30-GHz calibration parameters were updated with values derived from tip 
curves.

Data between 9/17 and 10/9 will be reprocessed to correct for the 30-GHz calibration.

• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Microwave brightness temperature(brightnessTemperature)
• Retrieved liquid water path(liquidWaterPath)

SGP/MWRHF/C1 - Dew formation on window

During night time, when the humidity is very high (RH ~ 100%) data are strongly affected 
by
dew formation on the window. 
This results in a smooth and large (80-150 K) increase of the brightness temperature from
early night to sunrise. Data are affected mostly at night.

• Sky brightness temperature (150 GHz)(tbsky150)
• Sky brightness temperature (90 GHz)(tbsky90)

FKB/MWRP/M1 - Heavy rain and fog at the site

The months of November and December have been very rainy and wet at the AMF site. During 
rain events the radiometer does not work properly because of water accumulating on the 
window. In addition condensation and fog will affect the data causing very high brightness 
temperatures. Although the instrument is equipped with rain detection system to flag bad 
data, it is important that the user pays extra attention to the quality of the data during 
periods of continuous rain, drizzle or fog by applying the quality checks and screening 
for high brightness temperatures.

• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Derived relative humidity(relativeHumidity)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Retrieved water vapor density(waterVaporDensity)
• Interpolated dewpoint temperature(dewpointTemperature)
• Microwave brightness temperature(brightnessTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Derived virtual temperature(virtualTemperature)
• Retrieved liquid water path(liquidWaterPath)
• air temperature (NGM250 predicted)(temperature)

SGP/MWR/C1 - Missing data

Data are missing and unrecoverable.

• 31.4 GHz sky signal(sky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Dummy altitude for Zeb(alt)
• (tknd)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• lon(lon)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Averaged total liquid water along LOS path(liq)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Blackbody kinetic temperature(tkbb)
• Sky Infra-Red Temperature(sky_ir_temp)
• MWR column precipitable water vapor(vap)
• Ambient temperature(tkair)
• 23.8 GHz Blackbody signal(bb23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 23.8 GHz(tc23)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)

NSA/MWRP/C1 - Radiometer thermally unstable

Between Dec 21 and Dec 23 the external temperature dropped to - 38 C. This caused a 
problem with the stability of the noise diode mount temperature and consequent problem with 
calibration.

• Derived relative humidity(relativeHumidity)
• Retrieved liquid water path(liquidWaterPath)
• Retrieved water vapor density(waterVaporDensity)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Interpolated dewpoint temperature(dewpointTemperature)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• air temperature (NGM250 predicted)(temperature)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

FKB/MWRP/M1 - Possible slight drift of V-band calibration

During the month of November and December the bias between model computations and 
measurements for the 51.25 and 52.28 GHz channels has slightly increased to about 3 K. This might 
be due to a slight drift in the calibration of these channels.

The calibration error associated with these data is increased, to 2-3 K, for these two 
months. See this plot for a comparison of measurements (solid lines) and model (red 
dots) for the 51.25 (black), 52.28 (blue) and 53.85-GHz (green) channels.

• Microwave brightness temperature(brightnessTemperature)

FKB/MWRP/M1 - Periodic decrease in the 30-GHz brightness temperature

Starting around 12/19 until the end of December, the 30-GHz brightness temperature started 
to show a periodic oscillation between 9 and 11 AM GMT. The cause of this is probably 
thermal instability of the radiometer since it does correspond with some larger 
oscillations of the mixer temperature. During this time external temperatures displayed large 
variations going from -10 C at night to about +5 C during the day. The corresponding liquid 
water path retrievals are affected showing periodic negative values.

Liquid water path retrievals between 12/19 and 12/31 are the most affected variable since 
they are largely affected by the 30-GHz channel. A time series plot of the data will 
clearly show the periodic fluctuation of the LWP variable.

• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Microwave brightness temperature(brightnessTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Retrieved liquid water path(liquidWaterPath)

NSA/MWRP/C1 - Radiometer thermally unstable

During January the radiometer was thermally unstable during several days of cold weather. 
The worst days of thermal instability were between Jan 12 and Jan 17.

• Retrieved liquid water path(liquidWaterPath)
• Retrieved water vapor density(waterVaporDensity)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• air temperature (NGM250 predicted)(temperature)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

NSA/MWRP/C1 - Hardware failure- Intermittent data

Data are intermittent during this time due to a failure of the analog board.
The calibration of V-band data may have slightly drifted due to power outages.

• Derived relative humidity(relativeHumidity)
• Interpolated dewpoint temperature(dewpointTemperature)
• air temperature (NGM250 predicted)(temperature)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)

NSA/MWRP/C1 - Missing data

The instrument was removed for repairs

• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Derived relative humidity(relativeHumidity)
• Internal blackbody reference temperature(blackbodyTemperature)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path(liquidWaterPath)
• Ambient surface pressure(surfacePressure)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Data quality flags(dataQualityFlags)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Derived virtual temperature(virtualTemperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Equilibrium level pressure(equilibriumLevelPres)
• base time(base_time)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Array of heights for the range gates(height)
• lat(lat)
• Dummy altitude for Zeb(alt)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Interpolated dewpoint temperature(dewpointTemperature)
• azimuth(azimuth)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• elevation(elevation)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• Level of free convection pressure(levelFreeConvectionPres)
• Retrieved water vapor density(waterVaporDensity)
• lon(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Frequency(frequency)
• Convective Available Potential Energy(cape)
• Flag indicating moisture sensor status(wetWindowFlag)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Lifting condensation level(liftingCondensationLevel)
• Level of free convection(levelFreeConvection)
• air temperature (NGM250 predicted)(temperature)
• Ambient surface absolute temperature(surfaceTemperature)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Retrieved cloud liquid water content(liquidWaterContent)
• Time offset of tweaks from base_time(time_offset)
• Ambient surface relative humidity(surfaceRelativeHumidity)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)
• time(time)
• Equilibrium level(equilibriumLevel)

NSA/MWRP/C1 - Thermal instability- TKnd test

During this time the radiometer was thermally unstable . The noise diode physical 
temperature had sudden drops of more than 5 degree in several ccasions between 2/1 and 2/11. On 
2/12 the radiometer temperature set point was lowered of about 10 degree as a test. On 
2/27 a new analog board was installed in the instrument. Data after 2/27 show a slight 
change in calibration.

• Derived relative humidity(relativeHumidity)
• Retrieved liquid water path(liquidWaterPath)
• Retrieved water vapor density(waterVaporDensity)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• air temperature (NGM250 predicted)(temperature)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

NSA/MWRP/C1 - V-band Noise diode unstable

Sometimes between Jan and March 2007 the V-band noise diode started to be unstable. V-band 
channels during this period show large discrepancies with model computations. The 
problem was evident during the month of January. During February and March the problem was less 
visible, however measurement model comparisons show an increased bias. The instrument 
was calibrated with LN2 on March 15 and the calibration results showed a large drift in the 
calibration parameters.  The hardware failure will have consequences in the retrievals 
of temperature and relative humidity profiles. 

It is difficult to establish when the failure started. Disregard the V-band channels 
during this period. Vertical profiles of temperature and humidity are affected as well. Please 
note that this DQR only covers the 7 channels (brightness temperatures) in the V-band 
range (51 to 60 GHz). The 5 K-band channels (20-31 GHz) are not affected.

• Derived relative humidity(relativeHumidity)
• Retrieved water vapor density(waterVaporDensity)
• Interpolated dewpoint temperature(dewpointTemperature)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

NSA/MWRP/C1 - V-band Noise diode failure

The LN2 calibration on 3/15 showed a large drift of the V-band calibration parameters. The 
radiometer was calibrated again in June and was sent out for repairs in July 2007.

Between 3/15 and 7/13 2007 the V-band data are incorrect and should be disregarded. The 
failure affects the retrieved vertical profiles of temperature and humidity as well.

Please note that the hardware failure affected the 7 V-band channels only (51-60 GHz). 
Channels in the frequency range between 20 and 30 GHz are not affected. Integrated liquid 
water (LWP) and water vapor (PWV) are not affected since they use K-band channels only.

• Derived relative humidity(relativeHumidity)
• Retrieved water vapor density(waterVaporDensity)
• air temperature (NGM250 predicted)(temperature)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

FKB/MWRHF/M1 - Questionable calibration

The instrument completed a tip curve calibration on June 30 and it did not calibrate again 
until Oct 13. Data during this time display large residuals (~ 6 K) when compared with 
model computations. It is likely that the tip curve calibration, although successful, 
wasn't good enough to have good accuracy.

Since this instrument is still under testing the users should use the data with caution. 
Although the accuracy of the model itself is still debated, large residuals between the 
measurements and the model between June and October are probably in large part due to the 
poor calibration.

• Sky brightness temperature (90 GHz)(tbsky90)
• Sky brightness temperature (150 GHz)(tbsky150)

SGP/MWR/B6 - Missing data

Data are missing due to software crash

• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• lon(lon)
• base time(base_time)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• (tknd)
• 23.8 GHz sky signal(tipsky23)
• Actual elevation angle(actel)
• 23.8 GHz Blackbody signal(bb23)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Dummy altitude for Zeb(alt)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Actual Azimuth(actaz)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• null(Raw data stream - documentation not supported)

• Temperature correction coefficient at 31.4 GHz(tc31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 23.8 GHz Blackbody signal(bb23)
• MWR column precipitable water vapor(vap)
• Mixer kinetic (physical) temperature(tkxc)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• lat(lat)
• Ambient temperature(tkair)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• (tknd)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• IR Brightness Temperature(ir_temp)
• base time(base_time)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz sky signal(sky23)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Time offset of tweaks from base_time(time_offset)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Sky brightness temperature at 23.8 GHz(tbsky23)

• Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
• Dummy altitude for Zeb(alt)
• Standard deviation about the mean for the total liquid water amount(liq_sdev)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
• 23.8 GHz sky brightness temperature(23tbsky)
• Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
• 31.4 GHz sky brightness temperature(31tbsky)
• Number of points included in the ir_temp ensemble(num_obs_irt)
• Standard deviation about the mean for the total water vapor amount(vap_sdev)
• Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Number of data points averaged for ir_temp(num_obs_ir)
• IR Brightness Temperature(ir_temp)
• lon(lon)
• base time(base_time)
• Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
• Averaged total liquid water along LOS path(liq)
• Number of data points averaged for 23tbsky, 31tbsky, vap & liq(num_obs)
• MWR column precipitable water vapor(vap)
• Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)

SGP/MWR/B6 - Reprocessed: Re-calibration

There was a slight change in the calibration of the instrument after it recovered from a 
data outage. 

Data were reprocessed with the following calibration coefficients:
Tnd23_nom = 238.29; Tc23 = 0.024
Tnd31_nom = 221.78; Tc31 = 0.013

The reprocessed data were archived June 2008.

• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)

• MWR column precipitable water vapor(vap)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Averaged total liquid water along LOS path(liq)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Sky brightness temperature at 31.4 GHz(tbsky31)

SGP/MWR/B4 - Missing data

Data are missing and unrecoverable.

• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Dummy altitude for Zeb(alt)
• Time offset of tweaks from base_time(time_offset)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• lon(lon)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Blackbody kinetic temperature(tkbb)
• MWR column precipitable water vapor(vap)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• 31.4 GHz sky signal(sky31)
• IR Brightness Temperature(ir_temp)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• lat(lat)
• Averaged total liquid water along LOS path(liq)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Sky Infra-Red Temperature(sky_ir_temp)
• 31.4 GHz blackbody(bb31)
• Ambient temperature(tkair)
• (tknd)
• 23.8 GHz sky signal(sky23)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• base time(base_time)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Mixer kinetic (physical) temperature(tkxc)
• (tknd)
• Temperature correction coefficient at 31.4 GHz(tc31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Blackbody kinetic temperature(tkbb)
• Actual Azimuth(actaz)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• lat(lat)
• 23.8 GHz Blackbody signal(bb23)
• Dummy altitude for Zeb(alt)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Actual elevation angle(actel)
• Time offset of tweaks from base_time(time_offset)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.4 GHz blackbody(bb31)
• base time(base_time)
• lon(lon)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Ambient temperature(tkair)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

NSA/MWRP/C1 - Reprocess: LN2 calibration needed

The V-band measurements are incorrect. The quantities affected are the temperature and 
humidity profiles.

V-band data should not be used until the instrument is calibrated and data are 
reprocessed.

The K-band data are acceptable.

• Derived relative humidity(relativeHumidity)
• Retrieved liquid water path(liquidWaterPath)
• Retrieved water vapor density(waterVaporDensity)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Interpolated dewpoint temperature(dewpointTemperature)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• air temperature (NGM250 predicted)(temperature)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Microwave brightness temperature(brightnessTemperature)
• Derived virtual temperature(virtualTemperature)
• Retrieved cloud liquid water content(liquidWaterContent)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)