Data Quality Reports for Session: 105417 User: clayton Completed: 04/26/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050722.1SGP/MWR/C1 - REPROCESS - Revised Retrieval CoefficientssgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1,
sgpqmemwrcolC1.c1
D050915.1SGP/MWR/C1 - Instrument noise problemsgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
D050919.6SGP/MWR/C1 - Instrument offlinesgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
D051011.6SGP/MWR/C1 - New software version (4.15) installedsgpmwrlosC1.b1, sgpmwrtipC1.a1


DQRID : D050722.1
Start DateStart TimeEnd DateEnd Time
04/16/2002200006/28/20052300
Subject:
SGP/MWR/C1 - REPROCESS - Revised Retrieval Coefficients
DataStreams:sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1,
sgpqmemwrcolC1.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).

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

PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ
LWP_MONORTM = 1.026  * LWP_ROSENKRANZ

The Rosenkranz-based retrieval coefficients became active as follows (BCR 456):
SGP/C1 (Lamont)     4/16/2002, 2000
SGP/B1 (Hillsboro)  4/12/2002, 1600
SGP/B4 (Vici)       4/15/2002, 2300
SGP/B5 (Morris)     4/15/2002, 2300
SGP/B6 (Purcell)    4/16/2002, 2200
SGP/E14(Lamont)     4/16/2002, 0000
NSA/C1 (Barrow)     4/25/2002, 1900 
NSA/C2 (Atqasuk)    4/18/2002, 1700
TWP/C1 (Manus)      5/04/2002, 0200
TWP/C2 (Nauru)      4/27/2002, 0600
TWP/C3 (Darwin)     inception

The MONORTM-based retrieval coefficients became active as follows (BCR 984):

SGP/C1 (Lamont)     6/28/2005, 2300
SGP/B1 (Hillsboro)  6/24/2005, 2100
SGP/B4 (Vici)       6/24/2005, 2100
SGP/B5 (Morris)     6/24/2005, 2100
SGP/B6 (Purcell)    6/24/2005, 1942
SGP/E14(Lamont)     6/28/2005, 2300
NSA/C1 (Barrow)     6/29/2005, 0000 
NSA/C2 (Atqasuk)    6/29/2005, 0000
TWP/C1 (Manus)      6/30/2005, 2100
TWP/C2 (Nauru)      6/30/2005, 2100
TWP/C3 (Darwin)     6/30/2005, 2100
PYE/M1 (Pt. Reyes)  4/08/2005, 1900**

** At Pt. Reyes, the original retrieval coefficients implemented in March 2005 were based 
on a version of the Rosenkranz model that had been modified to use the HITRAN half-width 
at 22 GHz and to be consistent with the water vapor continuum in MONORTM.  These 
retrievals yield nearly identical results to the MONORTM retrievals.  Therefore the Pt. Reyes 
data prior to 4/08/2005 may not require reprocessing.
Measurements:sgpmwrtipC1.a1:
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)

sgp5mwravgC1.c1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean total liquid water amount along LOS path(liq)

sgpmwrlosC1.b1:
  • Mean total water vapor amount along LOS path(vap)
  • Mean total liquid water amount along LOS path(liq)

sgp1mwravgC1.c1:
  • Mean total liquid water amount along LOS path(liq)
  • Mean total water vapor amount along LOS path(vap)

sgpqmemwrcolC1.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)

sgpmwrlosC1.a1:
  • Mean total liquid water amount along LOS path(liq)
  • Mean total water vapor amount along LOS path(vap)


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DQRID : D050915.1
Start DateStart TimeEnd DateEnd Time
07/28/2005140008/05/20051700
Subject:
SGP/MWR/C1 - Instrument noise problem
DataStreams:sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
Description:
Various variables including the mixer temperatures were very noisy. After several attempts 
to fix the problem, the instrument was taken off line and returned to the manufacturer 
for repair.
Measurements:sgpmwrtipC1.a1:
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • 31.4 GHz Blackbody signal(bb31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise diode mount temperature(tknd)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz Blackbody signal(bb23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Ambient temperature(tkair)
  • Mixer kinetic (physical) temperature(tkxc)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 31.4 GHz sky signal(tipsky31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(tipsky23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)

sgp5mwravgC1.c1:
  • Flag indicating where the initial surface water measurements are from: 0-> SMOS,
    1-> AERI(water_flag)
  • Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)
  • Averaged 23.8 GHz sky brightness temperature(23tbsky)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Number of data points averaged out of 15(number_obs_averaged)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Mean total liquid water amount along LOS path(liq)
  • Mean IR brightness temperature(ir_temp)
  • Probability of level change in ratio of averaged brightness temps(prob_level_change)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Probability of slope change in ratio of averaged brightness temps(prob_slope_change)
  • Probability of outlier in ratio of averaged brightness temps(prob_outlier)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Averaged 31.4 GHz sky brightness temperature(31tbsky)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Mean total water vapor amount along LOS path(vap)

sgpmwrlosC1.b1:
  • 31.4 GHz sky signal(sky31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(sky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mean total liquid water amount along LOS path(liq)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz Blackbody signal(bb31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Blackbody kinetic temperature(tkbb)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Mean total water vapor amount along LOS path(vap)
  • Ambient temperature(tkair)
  • 23.8 GHz Blackbody signal(bb23)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise diode mount temperature(tknd)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Temperature correction coefficient at 23.8 GHz(tc23)

sgp1mwravgC1.c1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Averaged 23.8 GHz sky brightness temperature(23tbsky)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Mean IR brightness temperature(ir_temp)
  • Mean total water vapor amount along LOS path(vap)
  • Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)
  • Averaged 31.4 GHz sky brightness temperature(31tbsky)
  • Mean total liquid water amount along LOS path(liq)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)


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DQRID : D050919.6
Start DateStart TimeEnd DateEnd Time
08/05/2005170108/30/20052100
Subject:
SGP/MWR/C1 - Instrument offline
DataStreams:sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1
Description:
Instrument was taken offline and returned to manufacturer for repair.  Data are missing 
and unrecoverable.
Measurements:sgpmwrtipC1.a1:
  • 31.4 GHz Blackbody signal(bb31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Actual elevation angle(actel)
  • Blackbody kinetic temperature(tkbb)
  • Ambient temperature(tkair)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • 31.4 GHz sky signal(tipsky31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(tipsky23)
  • Time offset of tweaks from base_time(time_offset)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise diode mount temperature(tknd)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz Blackbody signal(bb23)
  • north latitude for all the input platforms.(lat)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mixer kinetic (physical) temperature(tkxc)
  • altitude above sea levelaltunits(alt)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Actual Azimuth(actaz)
  • Time offset from base_time(base_time)
  • east longitude for all the input platforms.(lon)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)

sgp5mwravgC1.c1:
  • Flag indicating where the initial surface water measurements are from: 0-> SMOS,
    1-> AERI(water_flag)
  • Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)
  • Averaged 23.8 GHz sky brightness temperature(23tbsky)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Mean IR brightness temperature(ir_temp)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Probability of slope change in ratio of averaged brightness temps(prob_slope_change)
  • Number of points included in the ir_temp ensemble(num_obs_irt)
  • Averaged 31.4 GHz sky brightness temperature(31tbsky)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Mean total water vapor amount along LOS path(vap)
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Number of data points averaged out of 15(number_obs_averaged)
  • Time offset from base_time(base_time)
  • Mean total liquid water amount along LOS path(liq)
  • Probability of level change in ratio of averaged brightness temps(prob_level_change)
  • east longitude for all the input platforms.(lon)
  • Number of points included in the ensemble of all the fields except the ir_temp
    fields(num_obs)
  • Probability of outlier in ratio of averaged brightness temps(prob_outlier)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Time offset of tweaks from base_time(time_offset)

sgpmwrlosC1.b1:
  • 31.4 GHz sky signal(sky31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • east longitude for all the input platforms.(lon)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Mean total water vapor amount along LOS path(vap)
  • 23.8 GHz Blackbody signal(bb23)
  • Time offset of tweaks from base_time(time_offset)
  • Noise diode mount temperature(tknd)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • altitude above sea levelaltunits(alt)
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • 23.8 GHz sky signal(sky23)
  • Mean total liquid water amount along LOS path(liq)
  • 31.4 GHz Blackbody signal(bb31)
  • Blackbody kinetic temperature(tkbb)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Ambient temperature(tkair)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Time offset from base_time(base_time)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • north latitude for all the input platforms.(lat)

sgp1mwravgC1.c1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
  • Averaged 23.8 GHz sky brightness temperature(23tbsky)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Mean IR brightness temperature(ir_temp)
  • Mean total water vapor amount along LOS path(vap)
  • Time offset of tweaks from base_time(time_offset)
  • Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)
  • north latitude for all the input platforms.(lat)
  • east longitude for all the input platforms.(lon)
  • Time offset from base_time(base_time)
  • Number of points included in the ir_temp ensemble(num_obs_irt)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • altitude above sea levelaltunits(alt)
  • Mean total liquid water amount along LOS path(liq)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Number of points included in the ensemble of all the fields except the ir_temp
    fields(num_obs)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Number of data points averaged for ir_temp(num_obs_ir)
  • Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
  • Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)
  • Averaged 31.4 GHz sky brightness temperature(31tbsky)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)


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DQRID : D051011.6
Start DateStart TimeEnd DateEnd Time
07/31/2002202708/04/20051959
Subject:
SGP/MWR/C1 - New software version (4.15) installed
DataStreams:sgpmwrlosC1.b1, sgpmwrtipC1.a1
Description:
A problem began with the installation of MWR.EXE version 4.12 in July 2002. The software 
had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one that 
caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip 
curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these 
problems.

The new MWR software, version 4.15, was installed on 08/04/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to 
~50s.
Measurements:sgpmwrtipC1.a1:
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz Blackbody signal(bb31)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Noise diode mount temperature(tknd)
  • 31.4 GHz sky signal(tipsky31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz Blackbody signal(bb23)
  • Blackbody kinetic temperature(tkbb)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • 23.8 GHz sky signal(tipsky23)
  • Ambient temperature(tkair)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)

sgpmwrlosC1.b1:
  • 31.4 GHz sky signal(sky31)
  • Noise diode mount temperature(tknd)
  • 31.4 GHz blackbody+noise injection signal(bbn31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 23.8 GHz sky signal(sky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mean total liquid water amount along LOS path(liq)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz Blackbody signal(bb31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Blackbody kinetic temperature(tkbb)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Mean total water vapor amount along LOS path(vap)
  • Ambient temperature(tkair)
  • 23.8 GHz Blackbody signal(bb23)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Temperature correction coefficient at 23.8 GHz(tc23)


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