Data Quality Reports for Session: 127122 User: anuskitade Completed: 04/06/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040920.1TWP/MWR/C2 - Data collection problemtwpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1
D050310.3TWP/MWR/C2 - Heater problemtwp5mwravgC2.c1, twpmwrlosC2.b1, twpmwrtipC2.a1
D050524.2TWP/MWR/C2 - mixer temperaturetwpmwrlosC2.b1, twpmwrtipC2.a1
D050725.10TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficientstwp5mwravgC2.c1, twpmwrlosC2.b1, twpqmemwrcolC2.c1
D050928.2TWP/MWR/C2 - New software version (4.15) installedtwpmwrlosC2.b1, twpmwrtipC2.a1
D061002.1TWP/MWR/C2 - Missing datatwp5mwravgC2.c1, twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1
D061121.1TWP/MWR/C2 - Missing DatatwpmwrlosC2.b1
D061213.3TWP/MWR/C2 - Reprocessed: New Calibration coefficientstwpmwrlosC2.b1, twpmwrtipC2.a1
D070412.3TWP/MWR/C1/C2 - Sun in the field of viewtwpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
D081216.1TWP/MWR/C2 - Incorrect ambient temperature during raintwpmwrlosC2.b1, twpmwrtipC2.a1
D090417.3TWP/MWR/C2 - Intermittent datatwpmwrlosC2.b1, twpmwrtipC2.a1


DQRID : D040920.1
Start DateStart TimeEnd DateEnd Time
08/27/2004200009/24/20040219
Subject:
TWP/MWR/C2 - Data collection problem
DataStreams:twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
Large, frequent data gaps occurred due to a failing laptop computer. The problem was 
corrected when a new computer was installed.
Measurements:twpmwrtipC2.a1:
  • 23.8 GHz sky signal(tipsky23)
  • Ambient temperature(tkair)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Actual Azimuth(actaz)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Time offset of tweaks from base_time(time_offset)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • lat(lat)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz Blackbody signal(bb23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • (tknd)
  • Dummy altitude for Zeb(alt)
  • 31.4 GHz blackbody(bb31)
  • Actual elevation angle(actel)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • lon(lon)
  • 31.4 GHz sky signal(tipsky31)
twpmwrC2.00:
  • null(Raw data stream - documentation not supported)
twpmwrlosC2.b1:
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Blackbody kinetic temperature(tkbb)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • lat(lat)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • 31.4 GHz blackbody(bb31)
  • IR Brightness Temperature(ir_temp)
  • Actual elevation angle(actel)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Ambient temperature(tkair)
  • (tknd)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz Blackbody signal(bb23)
  • Dummy altitude for Zeb(alt)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)

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DQRID : D050310.3
Start DateStart TimeEnd DateEnd Time
02/04/2005234003/14/20051650
Subject:
TWP/MWR/C2 - Heater problem
DataStreams:twp5mwravgC2.c1, twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
When the wiring of the air temperature sensor was checked the heater apparently began 
activating too often.
Measurements:twpmwrtipC2.a1:
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
twp5mwravgC2.c1:
  • Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
twpmwrlosC2.b1:
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)

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DQRID : D050524.2
Start DateStart TimeEnd DateEnd Time
02/04/2005234004/19/20050242
Subject:
TWP/MWR/C2 - mixer temperature
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
When the wiring of the air temperature sensor was checked the mixer temperature 
unexpectedly decreased 4 degrees. It increased to its normal value when the dielectric window was 
replaced. The problem was probably caused by a loose and/or corroded connection.
Measurements:twpmwrtipC2.a1:
  • Mixer kinetic (physical) temperature(tkxc)
twpmwrlosC2.b1:
  • Mixer kinetic (physical) temperature(tkxc)

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DQRID : D050725.10
Start DateStart TimeEnd DateEnd Time
04/27/2002060006/30/20052100
Subject:
TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients
DataStreams:twp5mwravgC2.c1, twpmwrlosC2.b1, twpqmemwrcolC2.c1
Description:
IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable 
water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were 
based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant 
(1957) liquid water absorption model.

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

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

The Rosenkranz-based retrieval coefficients became active at TWP.C2 20020427.0600.  The 
MONORTM-based retrieval coefficients became active at TWP.C2 20050630.2100.

Note: The TWP.C2 data for 19981028-20050630 have been reprocessed to apply the 
MONORTM-based retrievals for all time.  The reprocessed data were archived 20061003.
Measurements:twpqmemwrcolC2.c1:
  • Ensemble average for MWR vapor in window centered about balloon release(mean_vap_mwr)
  • Ensemble average for MWR liquid in window centered about balloon release(mean_liq_mwr)
twp5mwravgC2.c1:
  • Averaged total liquid water along LOS path(liq)
  • MWR column precipitable water vapor(vap)
twpmwrlosC2.b1:
  • Averaged total liquid water along LOS path(liq)
  • MWR column precipitable water vapor(vap)

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DQRID : D050928.2
Start DateStart TimeEnd DateEnd Time
11/01/2002210109/15/20051424
Subject:
TWP/MWR/C2 - New software version (4.15) installed
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
A problem began with the installation of MWR.EXE version 4.12 in November 2002. The 
software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one that 
caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of 
tip curves, and saturation of CPU usage.  Software versions 4.13 and 4.14 also produced 
these problems.

The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.
Measurements:twpmwrtipC2.a1:
  • 23.8 GHz sky signal(tipsky23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Ambient temperature(tkair)
  • Blackbody kinetic temperature(tkbb)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • (tknd)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 31.4 GHz blackbody(bb31)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 31.4 GHz sky signal(tipsky31)
twpmwrlosC2.b1:
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • 31.4 GHz blackbody(bb31)
  • IR Brightness Temperature(ir_temp)
  • Blackbody kinetic temperature(tkbb)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Ambient temperature(tkair)
  • MWR column precipitable water vapor(vap)
  • (tknd)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz Blackbody signal(bb23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Temperature correction coefficient at 31.4 GHz(tc31)

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DQRID : D061002.1
Start DateStart TimeEnd DateEnd Time
09/14/2006150011/27/20061900
Subject:
TWP/MWR/C2 - Missing data
DataStreams:twp5mwravgC2.c1, twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
The heater blower assembly was causing the fuse to blow.  The instrument was taken offline 
until a replacement arrives.
Measurements:twpmwrtipC2.a1:
  • 23.8 GHz sky signal(tipsky23)
  • Ambient temperature(tkair)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Actual Azimuth(actaz)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Time offset of tweaks from base_time(time_offset)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • lat(lat)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz Blackbody signal(bb23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • (tknd)
  • Dummy altitude for Zeb(alt)
  • 31.4 GHz blackbody(bb31)
  • Actual elevation angle(actel)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • lon(lon)
  • 31.4 GHz sky signal(tipsky31)
twp5mwravgC2.c1:
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Averaged total liquid water along LOS path(liq)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • IR Brightness Temperature(ir_temp)
  • base time(base_time)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Dummy altitude for Zeb(alt)
  • Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
  • lon(lon)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Number of data points averaged for 23tbsky, 31tbsky, vap & liq(num_obs)
  • Number of points included in the ir_temp ensemble(num_obs_irt)
  • MWR column precipitable water vapor(vap)
twpmwrC2.00:
  • null(Raw data stream - documentation not supported)
twpmwrlosC2.b1:
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Blackbody kinetic temperature(tkbb)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • lat(lat)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • 31.4 GHz blackbody(bb31)
  • IR Brightness Temperature(ir_temp)
  • Actual elevation angle(actel)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Ambient temperature(tkair)
  • (tknd)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz Blackbody signal(bb23)
  • Dummy altitude for Zeb(alt)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)

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DQRID : D061121.1
Start DateStart TimeEnd DateEnd Time
11/02/1998211211/06/19982140
07/02/2000200007/04/20000047
02/09/2002230002/11/20022300
01/23/2004110001/27/20041957
05/27/2005114305/29/20052132
Subject:
TWP/MWR/C2 - Missing Data
DataStreams:twpmwrlosC2.b1
Description:
Data are missing and unrecoverable.
Measurements:twpmwrlosC2.b1:
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • lat(lat)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • lon(lon)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Time offset of tweaks from base_time(time_offset)
  • 31.4 GHz blackbody(bb31)
  • IR Brightness Temperature(ir_temp)
  • Actual elevation angle(actel)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Blackbody kinetic temperature(tkbb)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Ambient temperature(tkair)
  • (tknd)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz Blackbody signal(bb23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Dummy altitude for Zeb(alt)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)
  • base time(base_time)

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DQRID : D061213.3
Start DateStart TimeEnd DateEnd Time
11/27/2006190011/30/20060700
Subject:
TWP/MWR/C2 - Reprocessed: New Calibration coefficients
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
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.
Measurements:twpmwrtipC2.a1:
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 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)
  • Temperature correction coefficient at 31.4 GHz(tc31)
twpmwrlosC2.b1:
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Averaged total liquid water along LOS path(liq)
  • MWR column precipitable water vapor(vap)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Sky brightness temperature at 23.8 GHz(tbsky23)

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DQRID : D070412.3
Start DateStart TimeEnd DateEnd Time
03/07/2007000004/02/20072359
03/01/2008000004/02/20082359
09/10/2008000010/12/20080000
03/01/2009000004/02/20092359
09/11/2009000010/10/20092359
Subject:
TWP/MWR/C1/C2 - Sun in the field of view
DataStreams:twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1
Description:
Every day between around noon local time (usually between 1 and 2 AM UTC time) there is an 
increase in the brightness temperatures due to the sun in the field of view of the 
radiometer.
Measurements:twpmwrtipC2.a1:
  • 23.8 GHz sky signal(tipsky23)
  • 31.4 GHz sky signal(tipsky31)
twpmwrtipC1.a1:
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
twpmwrlosC1.b1:
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz sky signal(sky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 31.4 GHz sky signal(sky31)
  • MWR column precipitable water vapor(vap)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
twpmwrlosC2.b1:
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 31.4 GHz sky signal(sky31)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • MWR column precipitable water vapor(vap)
  • Sky brightness temperature at 23.8 GHz(tbsky23)

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DQRID : D081216.1
Start DateStart TimeEnd DateEnd Time
10/09/2008010001/09/20090300
Subject:
TWP/MWR/C2 - Incorrect ambient temperature during rain
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
The ambient temperature was approximately 15 degree higher than what it should be when it 
was raining and the heater came. On Jan 9 2009 the dewblower was replaced which solved 
the problem.

The increased ambient temperature (tkair) was happening during times of rain and users 
should always disregard MWR data during rain events.  Therefore this DQR is colored 
transparent.
Measurements:twpmwrtipC2.a1:
  • Ambient temperature(tkair)
twpmwrlosC2.b1:
  • Ambient temperature(tkair)

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DQRID : D090417.3
Start DateStart TimeEnd DateEnd Time
03/06/2009160003/14/20092200
Subject:
TWP/MWR/C2 - Intermittent data
DataStreams:twpmwrlosC2.b1, twpmwrtipC2.a1
Description:
There are several short data gaps (usually 2 to 7 hours) in the data due to computer 
malfunction. The problem was solved by replacing the computer.
Measurements:twpmwrtipC2.a1:
  • 23.8 GHz sky signal(tipsky23)
  • Ambient temperature(tkair)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Actual Azimuth(actaz)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Time offset of tweaks from base_time(time_offset)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • lat(lat)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz Blackbody signal(bb23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • (tknd)
  • Dummy altitude for Zeb(alt)
  • 31.4 GHz blackbody(bb31)
  • Actual elevation angle(actel)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • lon(lon)
  • 31.4 GHz sky signal(tipsky31)
twpmwrlosC2.b1:
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Blackbody kinetic temperature(tkbb)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • base time(base_time)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • lat(lat)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • 31.4 GHz blackbody(bb31)
  • IR Brightness Temperature(ir_temp)
  • Actual elevation angle(actel)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Ambient temperature(tkair)
  • (tknd)
  • MWR column precipitable water vapor(vap)
  • 23.8 GHz Blackbody signal(bb23)
  • Dummy altitude for Zeb(alt)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)

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