TWP/SONDE/C2  - Broken temperature sensor

The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Dry bulb temperature(tdry)
• Surface dew point temperature(dp)

TWP/SONDE/C2  - Broken temperature sensor

The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Dry bulb temperature(tdry)
• Surface dew point temperature(dp)

TWP/SONDE/C2  - Bad RH in lower 8km

It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

TWP/VCEIL/C2 - Vceil computer disconnected

VCEIL computer was disconnected during this time period.

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

TWP/SMET/C2 - Temp/RH probe failure

Temperature/RH probe failed and was replaced.

• Mean Relative Humidity(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Std Dev of Air Temperature(temp_sd)
• Temperature minimum(temp_min)
• Relative humidity minimum(relh_min)
• Vapor pressure standard deviation(vappress_sd)
• Temperature maximum(temp_max)
• Vapor pressure mean(vappress_mean)

TWP/VCEIL/C2 - Time offset

On 7/14/2006, I found that the ceilometer time was 8m 36s slow, the PC time display (lower 
right taskbar) was frozen at "22:24", and AboutTime was not running. Corrected it on 
7/17 by running AboutTime so that 19:03:29 became 19:12:05. This also corrected the frozen 
display on the Windows98 taskbar. 

I am not sure of the start time of this problem but there were several other Windows 
related issues that had to be corrected on 5/14 with indications of inappropriate access via 
Remote Administrator on 5/13. I do not know if the time offset was a sudden or gradual 
change.

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

TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Barometric Pressure(atmos_pressure)

TWP/MWR/C2 - Missing data

The heater blower assembly was causing the fuse to blow.  The instrument was taken offline 
until a replacement arrives.

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

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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

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

TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. 
Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC2.b1 datastream.  Between 9/26 and 11/29, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros are 
not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19981021-20060926 and data from 
19981021-20061129 will be filled with -9999 (missing).

• base time(base_time)

TWP/MWR/C2 - Reprocessed: New Calibration coefficients

On 11/27 a spare radiometer was installed to replace a faulty radiometer. Once the 
radiometer started to collect data it used the default calibration coefficients until it 
collected enough tip data to determine its own coefficients.

The data were reprocessed to apply corrected calibrations and the reprocessed data were 
archived 20061222.

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

• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)

TWP/VCEIL/C2 - optical cross-talk compensation

The ceilometer gave frequent optical cross-talk compensation warnings, was insensitive to 
high clouds, and the tropics window was deteriorated. The instrument was replaced with a 
spare.

• Aerosol backscatter coefficient at 355 nm(backscatter)
• Vertical visibility(vertical_visibility)
• Altitude of highest signal(alt_highest_signal)
• Third cloud base height(third_cbh)
• Second lowest cloud base height(second_cbh)
• Millivolts at internal ADC input(window_contamination)

TWP/SONDE/C2 - Surface Temperature Incorrect

The first two temperature values in the datafile are incorrect.  It appears that the 
observer mis-typed the surface temperature as -27 instead of +27.  The next value was 8 which 
is also incorrect and was caused by the system interpolating from the incorrect surface 
value and what the sonde temperature sensor was reading.

• Dry bulb temperature(tdry)

TWP/SONDE/C2 - Surface RH value incorrect

The surface RH value was incorrect.  It appears the observer mis-typed 70 instead of 80.  
This error also caused the dew point temperature to be incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

TWP/SONDE/C2 - Surface RH value incorrect

The surface RH was reproted as 78%.  The value should have been in the low 50's.  It 
appears the observer did not allow the sonde to equilibrate to ambient conditions before 
taking the reading.  This error also caused an incorrect dew point.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

TWP/VCEIL/C2 - Receiver failure

The receiver failed and the instrument was replaced.  Data during the specified period are 
not valid.

• Aerosol backscatter coefficient at 355 nm(backscatter)
• Vertical visibility(vertical_visibility)
• Altitude of highest signal(alt_highest_signal)
• Third cloud base height(third_cbh)
• Second lowest cloud base height(second_cbh)
• Lowest cloud base height detected.(first_cbh)
• Millivolts at internal ADC input (0 to 2500)(background_light)
• Backscatter sum(sum_backscatter)

TWP/SONDE/C2 - Surface RH Value incorrect

The surface value entered by the observers for RH (96%) is incorrect.  At the ascent time 
listed in the .ptu file the readings by the Sonde were around 65%.  This low RH value is 
supported by the nearby SMET tower RH reading of 71.8%.  This also caused the surface dew 
point to be incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

TWP/SONDE/C2 - Surface RH too high

The surface Rh was entered as 94%.  The ascent time has 72% and this value is supported by 
RH values from the nearby SMET system.  This error also will affect the dew point.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)

TWP/MWR/C1/C2 - Sun in the field of view

Every day between 3/7 and 4/2 around noon local time there is an increase in the 
brightness temperatures due to the sun in the field of vie of the radiometer.

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

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

• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 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)

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

TWP/SONDE/C2 - Broken temperature sensor at launch

Temperature sensor broken at launch.  All thermodynamic values are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Surface dew point temperature(dp)
• Wind Direction(deg)

TWP/SONDE/C2 - Broken temperature sensor at launch

The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.

• Relative humidity inside the instrument enclosure(rh)
• Dry bulb temperature(tdry)
• Surface dew point temperature(dp)

TWP/SMET/C2 - Lower windspeed sensor questionable

Lower wind speed sensor had degraded bearings.  This sensor was reporting as much as 0.4 
m/s lower values than the upper sensors when the winds were 2 m/s or below.  The sensor 
was replaced.

• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)

TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect

Wind directions between lower and upper anemometers were displaced by approximately 45 
degrees from 05/10/2007 through 05/21/2007 when a new sensor was installed to replace a 
failing sensor.  The new sensor direction data incorrect.

• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)

TWP/AERI/C2 - Conditioning Electronics Off

The conditioning electronics box on the Electronics was was switched off for the two days 
in question.  It might have been bumped or something.  It was turned back on at the end 
of the day on July 3rd, 2007.  Do not use the data from July 2nd or July 3rd.

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

• Raw data stream - documentation not supported(raw)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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

• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• lat(lat)
• 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)
• 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 offset of tweaks from base_time(time_offset)
• AERI instrument data channel number(channelNumber)
• base time(base_time)
• Observation latitude(Latitude)
• lon(lon)
• Version number of Operational Software(systemReleaseNumber)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Mean of radiance spectra ensemble(mean_rad)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Time (HHMMSS)(timeHHMMSS)
• AERI instrument unit serial number(AERIunitNumber)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Dummy altitude for Zeb(alt)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Observation Altitude(Altitude)
• Julian Day including day and fraction of day(JulianDay)
• Observation longitude(Longitude)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Observation date(dateYYMMDD)
• Duration of scene view(sceneViewDuration)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• time(time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Wave number(wnum)

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

• Standard deviation of the average radiance in the 985-990 wavenumber window
  during the AERI dwell time(aeri_dwell_atm_var_channel_1)
• Dummy altitude for Zeb(alt)
• Cloud base height from the MPL(mean_mpl_cbh)
• Ensemble average of 23.8 GHz sky brightness temperature from the MWR(mean_23tbsky)
• Standard deviation of the average radiance in the 2510-2515 wavenumber window
  during the AERI dwell time(aeri_dwell_atm_var_channel_2)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky)
• Binary field indicating which inputs are available and used to set the
  nonclear_flag(nonclear_inputs)
• Standard deviation of cloud2 ensemble(sdev_cloud2_cbh)
• Standard deviation of mpl_cbh ensemble(sdev_mpl_cbh)
• Standard deviation of ratio ensemble about mean_dir_to_diff_ratio(sdev_dir_by_diff_ratio)
• Number of clear observations in ensemble(nobs_mpl_clear)
• Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
• Standard deviation of the IR temperature ensemble(sdev_irt)
• Calculated cloud cover fraction from the WSI(cloud_cover_fract)
• Number of foggy observations in ensemble (probably condensation on the window)(nobs_mpl_foggy)
• Average IR temperature from the IRT (on the MWR)(mean_irt)
• Standard deviation of cloud1 ensemble(sdev_cloud1_cbh)
• Number of observations in each `large` MWR ensemble (23tbsky and 31tbsky)(nobs_mwr_ensembles_large)
• Number of cloudy observations in ensemble(nobs_cloud3_cbh)
• base time(base_time)
• Standard deviation of liq ensemble(sdev_liq)
• Number of observations in each MWR ensemble (23tbsky, 31tbsky, vap, liq)(nobs_mwr_ensembles)
• Cloud base height estimate from the field mean_AERI_BT_channel_1(cbh_AERI_channel_1)
• Retrieved profile sample time minus sonde launch time(sonde_offset_time)
• Ensemble average of total water vapor along LOS path from the MWR(mean_vap)
• Ensemble average of second cloud base height from the Belfort ceilometer(mean_cloud2_cbh)
• Standard deviation of 23tbsky ensemble(sdev_23tbsky)
• Ensemble average of 31.4 GHz sky brightness temperature from the MWR(mean_31tbsky)
• Standard deviation of 23tbsky ensemble(sdev_23tbsky_large)
• Time offset of tweaks from base_time(time_offset)
• Number of cloudy observations in ensemble(nobs_cloud1_cbh)
• IR temperature calculated from the AERI spectral response function used to
  mimick the output from the IR thermometer on the MWR(calculated_irt)
• Cloud detection flag from sgpaerilblcloudsC1.c1(nonclear_flag)
• Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)
• lat(lat)
• Ensemble average of ratios of direct_norm_broadband divided by
  diffuse_hemisp_broadband from the SIROS(mean_dir_by_diff_ratio)
• Ensemble average of third cloud base height from the Belfort ceilometer(mean_cloud3_cbh)
• Average total liquid water along LOS path from the MWR(mean_liq)
• Standard deviation of vap ensemble(sdev_vap)
• Number of clear observations in ensemble(nobs_cloud2_clear)
• Number of cloudy observations in ensemble(nobs_mpl_cbh)
• AERI sample time minus WSI image time(wsi_offset_time)
• Number of clear observations in ensemble(nobs_cloud1_clear)
• Standard deviation of cloud3 ensemble(sdev_cloud3_cbh)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky_large)
• Data quality flag for MPL cbh ensemble(mpl_cbh_dq_flag)
• Number of cloudy observations in ensemble(nobs_cloud2_cbh)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 1: [1142.20,1147.03](mean_AERI_BT_channel_1)
• Serial number for the sonde used at this time.(sonde_serial_number)
• Ensemble average of first cloud base height from the Belfort ceilometer(mean_cloud1_cbh)
• Number of clear observations in ensemble(nobs_cloud3_clear)
• time(time)
• lon(lon)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2)
• Number of ratios in ensemble(nobs_dir_by_diff_ratio)

TWP/AERI/C2 - Reprocess: Incorrect lat/lon/alt

AERI reporting wrong lat/lon in data.  The values reported are representative of Darwin, 
not Nauru.  A low level reprocessing task has been submitted.

• lon(lon)
• lat(lat)

• Raw data stream - documentation not supported(raw)

• lon(lon)
• lat(lat)

• lon(lon)
• lat(lat)

• lon(lon)
• lat(lat)

• lon(lon)
• lat(lat)

TWP/SMET/C2 - Lower Wind Speed Data Suspect

The lower wind speed bearings appeared to be binding at speeds below 2 m/s as it did not 
compare well with the upper wind monitor.

• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)