NSA/MMCR/C1 - NSA/C1/MMCR- Incorrect Calibrations

From 3-July 2001 to 26-July 2001, the NSA MMCR calibration for the
two coded pulse modes is incorrect.  The values of reflectivity computed
by the radars autocalibration software are wrong because they use the
wrong radar constant.  The correct radar constants are: 8-bit coded
mode RC=16.344 and for the 32-bit coded RC=7.313. 

The only impact of the incorrect radar constants should be reflectivity
value

• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)

NSA/MMCR/C1 - Pulse controller failed due to water damage

Instrument had water damage that fried the pulse controller
card.  Images appear normal, but no clouds were detected
during this period because no radar pulse was being emitted.

Note from Karen Johnson: the ARSCL and MMCRMODE data fields
may or may not be suspect, depending on whether ARSCL correctly
identified the MMCR data as bad.

• ModeId
• CloudLayerTopHeightMplCloth
• CloudLayerBottomHeightMplCamp
• SignaltoNoiseRatio
• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• RadarFirstTop
• CloudLayerTopHeightMplCamp
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
• MMCR Spectral Width(SpectralWidth)
• CloudLayerBottomHeightMplCloth

NSA/MMCR/C1 - No radar pulse transmission

A fault in transmission occurred so no radar pulse was emitted and therefore no return 
signal, only noise, was received.

Note from Karen Johnson: the ARSCL and MMCRMODE data fields
may or may not be suspect, depending on whether ARSCL correctly
identified the MMCR data as bad.

• ModeId
• CloudLayerTopHeightMplCloth
• CloudLayerBottomHeightMplCamp
• SignaltoNoiseRatio
• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• RadarFirstTop
• CloudLayerTopHeightMplCamp
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
• MMCR Spectral Width(SpectralWidth)
• CloudLayerBottomHeightMplCloth

NSA/MMCR/C1 - MUX failure

Data values dropped to background clear sky (noise level).
Other cloud instruments indicated it was cloudy. The MUX
card was replaced and good data started flowing again at 
00 GMT on 3/19.

Note from Karen Johnson: the ARSCL and MMCRMODE data fields
may or may not be suspect, depending on whether ARSCL correctly
identified the MMCR data as bad.

• ModeId
• CloudLayerTopHeightMplCloth
• CloudLayerBottomHeightMplCamp
• SignaltoNoiseRatio
• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• RadarFirstTop
• CloudLayerTopHeightMplCamp
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
• MMCR Spectral Width(SpectralWidth)
• CloudLayerBottomHeightMplCloth

NSA/MPL/C1 - laser head failure

On 2002-04-28 the laser energy was observed to decrease throughout the day.  Although low 
clouds continued to be detected, by the end of the day the output laser energy was about 
10% of nomimal.  This decrease continued throughout 2002-04-29 to the extent that clouds 
were no longer detected.  The source of failure was eventually determined to be the laser 
head, requiring the MPL to be shipped for repair.  The MPL was reinstalled on 2002-08-28 
at about 01:00 UTC.  

MPL NSA data from 2002-04-29 through 2002-08-27 (inclusive) should not be used.

• transceiver_altitude_angle
• base_time
• instrument_temp
• range_bin_time
• range
• filter_temp
• max_altitude
• time
• property
• Preliminary cloud base height(preliminary_cbh)
• Altitude above mean sea level(alt)
• scalar_sync_offset
• laser_scalar_sync_offset
• voltage_10
• voltage_15
• range_bin_width
• range_bins
• Pressure, associated geometric height, at altitude, NGM model output(height)
• East longitude(lon)
• range_offset
• energy_monitor
• shots_sum
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• shots_summed
• trigger_freq
• pulse_rep
• total_counts
• transceiver_azimuth_angle
• North latitude(lat)
• laser_temp
• time_offset
• background_signal
• detector_temp
• laser_sync_offset
• deadtime_correction
• voltage_05

NSA/MPL/C1 - Laser Q-Switch Problem

At about 22:52 UTC on 2004/01/19, the NSA MPL appears to have suffered a temporary failure 
of the laser Q-Switch.  This results in a complete loss of lidar data immediately 
thereafter.  The problem was resolved (at least for the time being) by disconnecting and 
reconnecting the Q-Switch cable on 2004/01/24 at about 00:16 UTC.  Data after this time appears 
good.

• range_bin_time
• range
• max_altitude
• filter_temp
• property
• scalar_sync_offset
• laser_scalar_sync_offset
• range_bin_width
• East longitude(lon)
• energy_monitor
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• trigger_freq
• transceiver_azimuth_angle
• time_offset
• laser_temp
• detector_temp
• laser_sync_offset
• deadtime_correction
• transceiver_altitude_angle
• base_time
• instrument_temp
• time
• Preliminary cloud base height(preliminary_cbh)
• Altitude above mean sea level(alt)
• voltage_10
• voltage_15
• range_bins
• Pressure, associated geometric height, at altitude, NGM model output(height)
• range_offset
• shots_sum
• shots_summed
• pulse_rep
• total_counts
• North latitude(lat)
• background_signal
• voltage_05

• range_bin_time
• background_signal
• Altitude above mean sea level(alt)
• voltage_15
• instrument_temp
• Preliminary cloud base height(preliminary_cbh)
• max_altitude
• detector_counts
• range_bins
• Pressure, associated geometric height, at altitude, NGM model output(height)
• time
• range
• voltage_05
• voltage_10
• East longitude(lon)
• pulse_rep
• filter_temp
• detector_temp
• base_time
• laser_temp
• range_bin_width
• shots_summed
• time_offset
• energy_monitor
• North latitude(lat)
• range_offset

NSA/MPL/C1 - Instrument problem

On 2/18, the energy monitor on the MPL dropped from 11 microjoules per second to 2 
microjoules per second.  This severely affected data quality.  This appears to be have been an 
intermittent cable problem for the laser Q-Switch. A new cable was provided and installed 
on 2-24.

• energy_monitor
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)

• energy_monitor

NSA/MPL/C1 - Hardware Failure/Missing Data

Data are missing during this extended period due to a hardware failure.

• transceiver_altitude_angle
• base_time
• instrument_temp
• range_bin_time
• range
• filter_temp
• max_altitude
• time
• property
• Preliminary cloud base height(preliminary_cbh)
• Altitude above mean sea level(alt)
• scalar_sync_offset
• laser_scalar_sync_offset
• voltage_10
• voltage_15
• range_bin_width
• range_bins
• Pressure, associated geometric height, at altitude, NGM model output(height)
• East longitude(lon)
• range_offset
• energy_monitor
• shots_sum
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• shots_summed
• trigger_freq
• pulse_rep
• total_counts
• transceiver_azimuth_angle
• North latitude(lat)
• laser_temp
• time_offset
• background_signal
• detector_temp
• laser_sync_offset
• deadtime_correction
• voltage_05

NSA/MWRP/C1 - Missing data

Data are missing and unrecoverable.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

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.

• range_bin_time
• filter_temp
• laser_scalar_sync_offset
• range_bin_width
• East longitude(lon)
• energy_monitor
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• trigger_freq
• transceiver_azimuth_angle
• time_offset
• detector_temp
• laser_sync_offset
• deadtime_correction
• base_time
• time
• Preliminary cloud base height(preliminary_cbh)
• Altitude above mean sea level(alt)
• voltage_10
• voltage_15
• range_offset
• shots_summed
• total_counts
• North latitude(lat)
• voltage_05
• range
• max_altitude
• property
• scalar_sync_offset
• laser_temp
• transceiver_altitude_angle
• instrument_temp
• Pressure, associated geometric height, at altitude, NGM model output(height)
• range_bins
• shots_sum
• pulse_rep
• background_signal

• Pressure, level of free convection(levelFreeConvectionPres)
• time
• liquidWaterPathRmsError
• Microwave brightness temperature(brightnessTemperature)
• Height, lifting condensation level(liftingCondensationLevel)
• liquidWaterContentRmsError
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• temperatureRmsError
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• azimuth
• Pressure, equilibrium level(equilibriumLevelPres)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Height, equilibrium level(equilibriumLevel)
• CAPE, Convective available potential energy(cape)
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterPath2RmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• infraredTemperature
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• totalPrecipitableWaterRmsError
• East longitude(lon)
• North latitude(lat)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• dataQualityFlags
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• time_offset
• frequency

• range_bin_time
• Altitude above mean sea level(alt)
• voltage_15
• max_altitude
• Pressure, associated geometric height, at altitude, NGM model output(height)
• range_bins
• detector_counts
• voltage_05
• voltage_10
• pulse_rep
• laser_temp
• base_time
• shots_summed
• time_offset
• North latitude(lat)
• range_offset
• background_signal
• instrument_temp
• Preliminary cloud base height(preliminary_cbh)
• time
• range
• East longitude(lon)
• detector_temp
• filter_temp
• range_bin_width
• energy_monitor

NSA/MPL/C1 - Frost on Viewport Window

During periods of extremely cold outside temperatures (-30 C or below), the MPL may suffer 
from reduced sensitivity due to obscuration of its viewport window with frost or 
condensation.  

During the winter of 1998-1999, on-site observers noted frost or condensation obscuring 
part or all of the viewport window.  A fan providing blowing heated air on the viewport had 
failed.  Although replacement of this fan reduced the degree of obscuration, the problem 
was not entirely eliminated.  During the summer of 1999 a more robust  forced-air system 
was installed and the problem was essentially solved except for during isolated cases of 
extremely cold weather.  Under these extreme conditions partial or complete obscuration 
of the window is still possible with the result that cloud detection sensitivity will be 
reduced depending on the fraction of the window surface obscured.  Even with significant 
obscuration, the MPL may still detect clouds and the cloud base heights of detected 
clouds will be reported correctly.  This problem is one of detection sensitivity only and does 
not affect the range scale in any way.

• Preliminary cloud base height(preliminary_cbh)
• background_signal
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)

NSA/MPL/C1 - Frost on Viewport Window

During periods of extremely cold outside temperatures (-30 C or below), the MPL may suffer 
from reduced sensitivity due to obscuration of its viewport window with frost or 
condensation.  

During the winter of 1998-1999, on-site observers noted frost or condensation obscuring 
part or all of the viewport window.  A fan providing blowing heated air on the viewport had 
failed.  Although replacement of this fan reduced the degree of obscuration, the problem 
was not entirely eliminated.  During the summer of 1999 a more robust  forced-air system 
was installed and the problem was essentially solved except for during isolated cases of 
extremely cold weather.  Under these extreme conditions partial or complete obscuration 
of the window is still possible with the result that cloud detection sensitivity will be 
reduced depending on the fraction of the window surface obscured.  Even with significant 
obscuration, the MPL may still detect clouds and the cloud base heights of detected 
clouds will be reported correctly.  This problem is one of detection sensitivity only and does 
not affect the range scale in any way.

• background_signal
• Preliminary cloud base height(preliminary_cbh)
• detector_counts

NSA/MPL/C1 - MPL clock drift

The MPL PC clock was noted to be off (slow) by more than an hour over a several day 
period.  It has previously been noted that the time synchronization program "D-4" fails to 
update the PC clock under certain circumstances.  As a result, the program "D-4" was replaced 
by "AboutTime" on 2/5/2004.  

The specifics of this problem are not well understood.  It turns out that the instrument 
has TWO clocks on the instrument computer display - one being displayed by the MPL 
software and the other being the PC clock displayed in the lower right-hand corner of the 
screen. The MPL software clock was the one that is noted on daily rounds and was never off by 
any amount. Apparently the only clock that was off was the computer clock.

What is clear is that between the time the MPL computer was installed on 11-11-2003 and 
the CM log on 1-06-2004 the MPL clock exhibited a discrepancy of over 1 hour and 20 
minutes.  What is not clear is whether this clock discrepancy was also applied to the data time 
stamps.  Furthermore, seven days later the MPL clock exhibited only a 1.77 second drift.  
Not exceptional at all, and not in line with the previous discrepancy of more than 4800 
seconds over a span of 57 days.

Attempts to identify gradual correctible clock drift in the MPL data were not successful.  
As a worst-case scenario, the MPL data may be inappropriately time-stamped by as much a 
1 hour 20 minutes and 41 seconds slow relative to UTC between the dates of 2003-11-11 and 
2004-01-06.  After this time until 2004-02-05 time synchronization was maintained within 
a few seconds a day with local observer assistance.

• base_time
• time_offset
• time

• time
• base_time
• time_offset

NSA/MPL/C1 - Diode failure

On 3/25, the energy monitor on the MPL dropped from 11 microjoules per second to 2 
microjoules per second.  We determined the problem was the diode; it reached the end of its 
lifetime. A replacement was sent.  Data quality returned to normal.

• energy_monitor
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)

• energy_monitor

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.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Pressure, equilibrium level(equilibriumLevelPres)
• dataQualityFlags
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPL/C1 - Intermittent Double Pulse from MPL laser

When Spectra Physics discontinued support for their laser diode power supply, an 
alternative was needed to extend the usefulness of the Spectra Physics laser head inside the MPLs. 
 The solution was to use a Coherent laser diode. Unfortunately, the Coherent diode 
lasers do not have the exact same characteristics as the Spectra Physics diode lasers. As a 
result, the output of the Spectra Physics laser head sometimes produces a second pulse 
close in time but lower in intensity from the first main pulse. This is known as “double pulsing”.

Not all of the Spectra Physics/Coherent combination systems produce a double pulse and the 
systems that do produce a double pulse do not always exhibit this behavior. It can be 
identified by a second peak at ~.2km. At first glance the signal in the data will resemble 
a low aerosol or cloud layer. When the double pulse is weak, the atmospheric signal will 
obscure the double pulse signal. At the ARM sites with a sunshade such as TWP and AMF, 
the double pulse can be seen when the sunshade closes during solar noon. When the sunshade 
closes, the MPL does not see atmospheric signal so the second pulse is evident. At SGP, a 
daily window cleaning is part of the routine. During this time the double pulse can be 
seen. Without a sunshade or window cleaning it is impossible to say definitively if double 
pulse is present. 

The first system to produce a double pulse was MPL s/n 008 located at TWP – C2 Nauru in 
February 2005. The second system was MPL s/n 004 located at SGP in August 2005. The 
potential for the other systems to produce a double pulse is high. However, as of March 2006, 
the MPLs at NSA, TWP – C1, TWP – C3 and AMF have not recorded data with the double pulse 
artifact. 

The ARM program is in the process of replacing all the MPLs with a newer model. After the 
new MPLs are deployed the double pulse problem should not be an issue. The old systems 
will be relegated as spares. The double pulse problem will return if an old system is 
needed to replace a failed new system.

• detector_counts

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.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

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.

• waterVaporDensityRmsError
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

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.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Pressure, equilibrium level(equilibriumLevelPres)
• totalPrecipitableWater2RmsError
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Height, lifting condensation level(liftingCondensationLevel)
• Height, level of free convection(levelFreeConvection)
• liquidWaterContentRmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• liquidWaterPath2RmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

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.

• Pressure, level of free convection(levelFreeConvectionPres)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• CAPE, Convective available potential energy(cape)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPL/C1 - Detector Failure

Beginning 12/25, the signal return displayed serious aliasing, reflection, or ringing of 
the detector, with a highly repetitive pattern repeating six or more times within the 
lowest 15 km.  On 01/02, the detector became very difficult to put into any type of operating 
condition. When it did operate, the "aliased" signal pattern was still present.

The detector was replaced.

• background_signal_std
• laser_temp
• energy_monitor
• signal_return
• background_signal

NSA/MPL/C1 - Missing data

System was down for detector replacement.

• base_time
• time
• laser_temp
• range_offset
• East longitude(lon)
• signal_return
• dead_time_corrected
• Pressure, associated geometric height, at altitude, NGM model output(height)
• range
• North latitude(lat)
• shots_per_avg
• scope_temp
• polarization_control_voltage
• Preliminary cloud base height(preliminary_cbh)
• Altitude above mean sea level(alt)
• max_altitude
• time_offset
• background_signal_std
• range_bin_width
• num_bins
• detector_temp
• pulse_rep
• range_bin_time
• polarization_control
• range_bins
• energy_monitor
• background_signal
• num_channels

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.

• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)

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.

• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)

NSA/MPL/C1 - No cross polarized data

The cross polarizor was not functioning so there is no cross polarized data.  All data 
during the specified period is circularly polarized.

• signal_return

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.

• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)

NSA/MPL/C1 - Bad Cross-Polarized data

The polarizer box was not recycled when the system was rebooted; thus only circularly 
polarized light was being emitted.  Ignore all cross polarized data.

• Attenuated backscatter, cross pol(signal_return_cross_pol)
• background_signal_cross_pol
• aqc_signal_return_cross_pol
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
• background_signal_std_cross_pol
• polarization_control_voltage_cross_pol

• polarization_control_voltage
• signal_return

• Attenuated backscatter, cross pol(signal_return_cross_pol)
• polarization_control_voltage_cross_pol
• aqc_signal_return_cross_pol
• background_signal_std_cross_pol
• background_signal_cross_pol
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)

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.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

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.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPL/C1/C2 - No cross polarization data

Even though the polarization voltage was reported as switching between circular and cross 
polarization states, there was no cross polarization taking place because the 
polarization box had not been recycled following a system reboot.

You will not be able to create depolarization values.  However all other processes, such 
as cloud base determination should be ok.

• Attenuated backscatter, cross pol(signal_return_cross_pol)
• background_signal_cross_pol
• aqc_signal_return_cross_pol
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
• background_signal_std_cross_pol
• polarization_control_voltage_cross_pol

• polarization_control_voltage
• signal_return

• Attenuated backscatter, cross pol(signal_return_cross_pol)
• polarization_control_voltage_cross_pol
• aqc_signal_return_cross_pol
• background_signal_std_cross_pol
• nsamples_cross_pol_average
• background_signal_cross_pol
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)

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.

• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Microwave brightness temperature(brightnessTemperature)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

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.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• waterVaporDensityRmsError
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

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.

• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Microwave brightness temperature(brightnessTemperature)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

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.

• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Microwave brightness temperature(brightnessTemperature)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)

NSA/MWRP/C1 - Spare radiometer installed

A spare radiometer was provided by Radiometrics while they try to fix our MWRP. The spare 
radiometer is of the same family as the one we have in Barrow and it will stay at the 
site until our radiometer is repaired.
A LN2 calibration will be performed next week.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Radiometer in mixed scanning-zenith mode

After installing the spare radiometer (D080409.2), the data started to be intermittent and 
the software froze several times. To test if the problem was due to the scanning 
procedure used with the other radiometer, the instrument was run with a zenith-only procedure at 
times and with the usual scanning procedure at restart. When restarted with the scanning 
procedure the software had problems, so it was decided to run the spare instrument only 
with the zenith-viewing mode until our instrument comes back.

The quality of the data should be unaffected. The only difference is that only data 
collected at 90 degree angle will be available until our instrument comes back.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Intermittent data

A spare radiometer was installed a the site to substitute the malfunctioning radiometer 
(see DQRs D080409.2 and D080421.1). During this time the spare radiometer had problems 
starting and was stopping collection suddenly. Data during this time are very intermittent 
with large gaps.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Reprocessed: LN2 calibration

On 4/9 a spare radiometer was installed at the site. On 4/18 a LN2 calibration was 
conducted. Upon examination of the data it appeared that the LN2 calibration was generally 
successful, however the 30-GHz channel was not calibrated properly.
New calibration coefficients for all K-band channels were derived and data for the whole 
month should be reprocessed with these newly derived coefficients. I will provide the new 
configuration file.

An explanation of the effects of the poor calibration is given in the Instrument Mentor 
Monthly Summary report. The poor calibration affected the LWP in particular. Re-calibration 
will correct the problem.

Data reprocessed 20080610.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Increased RF intereference

The spare radiometer experienced increased levels of RF interference. The interference is 
prominent on the 30-GHz channel and LWP retrievals that appear particularly noisy.

• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)

NSA/MWRP/C1 - Reprocessed: LN2 calibrations applied

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

The instrument was re-calibrated on July 18.  The new calibrations have been applied to 
the data for this time period.  The reprocessed data were archived in January 2009.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

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

The V-band noise diode is showing signs of instability. Starting about August 5 the 
comparison of brightness temperatures with model showed an increased divergence resulting from 
a downward trend in the brightness temperatures of frequencies > 50 GHz.

Disregard brightness temperatures and retrieved products associated with the V-band 
channels. These include all profiles. Integrated water vapor and liquid water path are not 
affected.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Height, lifting condensation level(liftingCondensationLevel)
• MET air temperature(temperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Microwave brightness temperature(brightnessTemperature)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)

NSA/MWRP/C1 - Incorrect V-band data

The V-band channels show a drift during this time.

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Height, lifting condensation level(liftingCondensationLevel)
• MET air temperature(temperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)

NSA/MWRP/C1 - Reprocessed: Negative bias in LWP

After the radiometer was installed at the site following extensive refurbishing the 
retrieved LWP had a large negative bias (~-0.07 mm). The calibration coefficients were modified 
and that resolved the problem. Data for February, March and part of April were 
reprocessed with the revised calibrations and archived in July.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/ARSCL/C1 - Reflectivity values unreliable

Reflectivity dBZ values should not be used.  The reported cloud boundaries may 
underestimate cloud tops, particularly for high or thick clouds.  Also thin high clouds may have 
been missed entirely, especially if there were lower-level cloud layers below them. During 
this time period, the MMCR was transmitting in  circular polarization, rather than 
(correct) linear polarization. This caused reported Reflectivity values to be too low by an 
unknown amount, resulting in an effective loss of radar sensitivity.

Areas identified as have having hydrometeor detections are correct, however some areas 
marked as clear may in fact contain cloud due to the MMCR's low sensitivity during this time.

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• CloudLayerBottomHeightMplCloth
• CloudLayerTopHeightMplCloth

• CloudLayerTopHeightMplCloth
• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• RadarFirstTop
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
• CloudLayerBottomHeightMplCloth

NSA/MWRP/C1 - Reprocessed: V-band channels too cold

The calibrations of 7/20 and 7/29 were slightly affected by high humidity at the site. As 
a result the V-band channels were calibrated too cold.

On 8/26 the mentor modified the configuration file and reinstated the calibration 
coefficients derived on 3/20/2009.

Data were reprocessed 20100118.

• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Microwave brightness temperature(brightnessTemperature)

NSA/MWRP/C1 - Reprocessed: LN2 calibration

The instrument was calibrated on 3/5/2010. These latest calibration coefficients have been 
applied to February data as well to mitigate the high bias in LWP observed in February.  
Reprocessed data were archived April 2010.

• Pressure, level of free convection(levelFreeConvectionPres)
• Height, lifting condensation level(liftingCondensationLevel)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Pressure, equilibrium level(equilibriumLevelPres)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - IRT readings bias

The MWRP IRT appeared to not be reaching its lower limit (-50 C / 223.15 K). The readings 
stayed around 230 K although the sky was clear. On 6/16 the site technicians noticed that 
the gold mirror was scratched and appeared to have a deposit on it. The mirror was 
replaced and on 6/17 the lens was cleaned. These actions solved the problem.

• infraredTemperature

NSA/MWRP/C1 - Reprocessed: Incorrect calibration

The calibration of the MWRP drifted starting on September 21. The drift caused a negative 
LWP. On 10/21 I modified the calibration of the 30 GHz channel in an attempt to correct 
for the negative bias in LWP. The change in the calibration however caused an excessive 
increase in the PWV retrievals. The original calibration values were reinstated on 10/29. I 
then recomputed the temperature coefficients as well as the noise diode injection 
temperature from tip curves and uploaded the new values on Nov 15 2010. 

Reprocess the data from 9/21 to 11/15 with the newly computed coefficients.

Reprocessing completed 20110111.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Calibration drift

The radiometer showed increased drift in the K-band calibration. Several attempts to 
correct for the drift did not return the expected result.  

Instrument was removed from service 20110201 and returned to vendor for repair.

Data are erratic; data use during the indicated time is not recommended.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Height, lifting condensation level(liftingCondensationLevel)
• Height, level of free convection(levelFreeConvection)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Incorrect brightness temperatures

The radiometer was reinstalled on 4/3/2011 but the 30 GHz data immediately appeared 
extremely noisy. The problem appears related to noise diode instability.

• Pressure, level of free convection(levelFreeConvectionPres)
• Height, lifting condensation level(liftingCondensationLevel)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Pressure, equilibrium level(equilibriumLevelPres)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/ARSCL/C1 - Reflectivity too high

The calibration of the MMCR was incorrect during this period, causing large positive 
shifts in reported reflectivity values.  As a result, the reflectivies reported by ARSCL are 
also too high.  However, other radar moments (MeanDopplerVelocity and SpectralWidth) and 
cloud boundaries reported in ARSCL data files are not affected and can be used.

Do not use ReflectivityBestEstimate, Reflectivity, or ReflectivityNoClutter values during 
this period.

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• Reflectivity(Reflectivity)

• MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
• Reflectivity(Reflectivity)
• MMCR Reflectivity, clutter removed(ReflectivityNoClutter)

NSA/MWRP/C1 - Reprocess: Incorrect calibration coefficients

The radiometer data need to be reprocessed with new calibrations.

• Pressure, level of free convection(levelFreeConvectionPres)
• Height, lifting condensation level(liftingCondensationLevel)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Pressure, equilibrium level(equilibriumLevelPres)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Rapid calibration drift

The radiometer calibration was rapidly drifting. Brightness temperatures as well as 
retrievals are incorrect.

• Pressure, level of free convection(levelFreeConvectionPres)
• Height, lifting condensation level(liftingCondensationLevel)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Height, level of free convection(levelFreeConvection)
• Pressure, equilibrium level(equilibriumLevelPres)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• CAPE, Convective available potential energy(cape)
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPLCMASK/C1 - Cloud layer metadata misleading

The comment in the header for cloud_base_layer indicates that a value of -1 indicates that 
no cloud is detected.  For the specified time range, a value of 0 indicates that no 
cloud is detected.

Values greater than zero indicate cloudy conditions, otherwise it is clear.

• cloud_base_layer

NSA/MWRP/C1 - Calibration temperature dependence

The calibration was showing a noticeable temperature dependence that was not corrected by 
the calibration coefficients. Between 2/26 and 3/23 the quality of the data and of the 
retrievals is degraded.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Reprocessed: Incorrect calibration

The LN2 calibration was only partially successful, some the K-band channels did not 
calibrate properly. On 4/25 new coefficients were derived from tip curves and were uploaded. 

The data for 4/13-4/25 were reprocessed to apply the 4/25 calibrations.  Reprocessed data 
were archived in July 2012.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - IRT data suspect

The IRT readings are mostly incorrect between 12/04/2012 and 11/20/2013.

• infraredTemperature

NSA/MWRP/C1 - Questionable calibration

The K-band channels didn't calibrate well with liquid nitrogen. On 2/10 the coefficients 
were updated with tip-derived values

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Thermal instability

The brightness temperatures and retrievals appear affected by some thermal instability.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPLCMASK/C1 - Reprocessing Notice (RID 1137)

See below for details of reprocessing that was completed on 20140807.  Original DQR 
category:
4 (Red, Incorrect).

-----------------------------------------------------------

Linear depolarization ratio calculation is incorrect in the VAP processing code.

• linear_depol_ratio

NSA/MWRP/C1 - calibration change

The calibration coefficients have slightly drifted affecting the brightness temperatures 
and the retrievals.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - missing data

Data are missing

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Reprocessing Notice (RID 1262)

See below for details of reprocessing that was completed on 20150309.  Original DQR 
category: 4 (Red, Incorrect).

-----------------------------------------------------------

The instrument appears to be unstable and the brightness temperatures are too warm. This 
affects the retrievals as well. The temperature dependence of the calibration coefficients 
has slightly changed.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - missing data

Data are missing

• Pressure, level of free convection(levelFreeConvectionPres)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• dataQualityFlags
• Pressure, equilibrium level(equilibriumLevelPres)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• totalPrecipitableWater2RmsError
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• wetWindowFlag
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Height, equilibrium level(equilibriumLevel)
• infraredTemperature
• CAPE, Convective available potential energy(cape)
• time
• time_offset
• liquidWaterPathRmsError
• waterVaporDensityRmsError
• surface pressure(pressure)
• blackbodyTemperature
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Mixing ratio, water vap., vert. prof. sfc-10km, frm retr. water vap. dens. prof(waterVaporMixingRatio)
• Altitude above mean sea level(alt)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Height, lifting condensation level(liftingCondensationLevel)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Height, level of free convection(levelFreeConvection)
• elevation
• liquidWaterContentRmsError
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• liquidWaterPath2RmsError
• Temperature, dew point, vert. prof. sfc-10km, from water vapor density prof.(dewpointTemperature)
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• frequency
• temperatureRmsError
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• MET air temperature(temperature)
• base_time
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• totalPrecipitableWaterRmsError
• East longitude(lon)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• North latitude(lat)
• azimuth
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MPL/C1  - Reprocessing Notice (RID 1305)

See below for details of reprocessing that was completed on 20160107.
Original DQR category: 0 (Black, Missing).

-----------------------------------------------------------
preliminary_cbh data are were never derived and are set to -9999.

• Preliminary cloud base height(preliminary_cbh)

NSA/MWRP/C1 - Reprocessing Notice (RID 1303)

See below for details of reprocessing that was completed on 20150626.  Original 
DQR category: 4 (Red, Incorrect).

-----------------------------------------------------------

The LN2 calibration performed on 2/20 was not successful for the K-band channels. On 2/27 
calibration coefficients derived from tip curves were reinstated.

• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• MET air temperature(temperature)
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Microwave brightness temperature(brightnessTemperature)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)

NSA/MWRP/C1 - Occasional incorrect surface relative humidity

The surface relative humidity readings show occasional flat values at 100% RH

• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)

NSA/DL/DLPROF/C1 - Reprocess: Incorrect serial number

The instrument serial number that appears in the netcdf files global attributes is 
incorrect. The correct serial number is 0514-82.

• base_time

NSA/CEIL/C1 - Data Missing

Site data system was being upgraded during this time frame.

• qc_sum_backscatter
• window_contamination
• range
• laser_temperature
• qc_vertical_visibility
• qc_laser_pulse_energy
• range_bounds
• detection_status
• alt_highest_signal
• qc_receiver_sensitivity
• base_time
• qc_background_light
• Cloud, base height, lowest base sensed(first_cbh)
• time
• time_bounds
• qc_third_cbh
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• sum_backscatter
• qc_laser_temperature
• receiver_sensitivity
• qc_first_cbh
• tilt_angle
• laser_pulse_energy
• measurement_parameters
• East longitude(lon)
• North latitude(lat)
• qc_window_contamination
• qc_window_transmission
• qc_second_cbh
• background_light
• Third cloud base height(third_cbh)
• status_string
• qc_alt_highest_signal
• time_offset
• window_transmission
• qc_tilt_angle
• status_flag
• Altitude above mean sea level(alt)
• Cloud, base height, second lowest base sensed(second_cbh)
• vertical_visibility

NSA/MWRP/C1- Small oscillations in the IRT readings

The IRT readings have small oscillations when the readings are around 260 K (overcast).

• infraredTemperature