Data Quality Reports for Session: 112454 User: anfrench Completed: 06/11/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020110.1SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020524.27SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RHsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020526.1SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020611.2SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etcsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.34SGP/SONDE/C1 - Incorrect Surface PressuresgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.35SGP/SONDE/C1 - Bad Temperature SensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020703.1SGP/SONDE/C1 - Temperature sensor failuresgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020909.1SGP/SONDE/C1 - Bad Temperature SensorsgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020909.2SGP/SONDE/C1 - Bad Temperature SensorsgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021006.1Bad temperature sensorsgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021117.1SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021121.1SGP/SONDE/C1 - Contaminated by interferencesgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021123.2SGP/SONDE/C1 - Interference CF sounding 20021120:0225sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D021201.1SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1


DQRID : D020110.1
Start DateStart TimeEnd DateEnd Time
01/08/2002052801/08/20020714
Subject:
SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
Temperature values in this sounding went from 3.5 degC at the surface to
-33.3 degC at the next sample.  It appears that all the remaining
temperature values have an approximate -35 degC offset.  The pressure
and RH values appear reasonable.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)

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DQRID : D020524.27
Start DateStart TimeEnd DateEnd Time
05/22/2002113005/22/20021347
Subject:
SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the sonde sensor boom was damaged upon launch.  The result
is that no RH data are reported and the reported temperature is something on
the order of 60 degC too low.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020526.1
Start DateStart TimeEnd DateEnd Time
05/23/2002112905/23/20021322
Subject:
SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the sensor boom was damaged shortly after launch.  The
temperature reading jumps -60 degC and the RH goes to 0.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020611.2
Start DateStart TimeEnd DateEnd Time
06/09/2002022906/09/20020236
Subject:
SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature and RH for this sounding look bad, either because of
interference from another sonde or because the temperature sensor was
broken on launch.  The sounding terminated early in any event.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020626.34
Start DateStart TimeEnd DateEnd Time
06/17/2002112806/17/20021313
Subject:
SGP/SONDE/C1 - Incorrect Surface Pressure
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the operator made a typographical error when entering the
surface pressure.  The file has 987.0 hPa and it probably should be 978.0
which would be consistent with the first sample provided by the radiosonde
(977.3 hPa), the surface pressures recorded for the adjacent soundings, and
the THWAPS pressure.

Because the sounding altitude is calculated assuming the surface pressure
is correct, the altitude values for the entire flight and the ascent rate 
values for the first 30 seconds of the sounding will be incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dummy altitude for Zeb(alt)
  • Ascent Rate(asc)
sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020626.35
Start DateStart TimeEnd DateEnd Time
06/19/2002232906/20/20020036
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the temperature sensor broke shortly after launch.  As a
result, the temperature and dewpoint values are incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D020703.1
Start DateStart TimeEnd DateEnd Time
06/27/2002172806/27/20021908
Subject:
SGP/SONDE/C1 - Temperature sensor failure
DataStreams:sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
Temperature sensor broke at launch.  All temperature-related variables
are incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
sgpqmemwrcolC1.c1:
  • Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
  • Integrated vapor column from sonde using a direct calculation (external from the
    IPM)(integ_vap_sonde_direct)

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DQRID : D020909.1
Start DateStart TimeEnd DateEnd Time
09/06/2002172709/06/20021854
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams:sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the temperature sensor broke upon launch and therefore the reported 
temperature is approximately 40 degC too low.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
sgpqmemwrcolC1.c1:
  • Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
sgplssondeC1.c1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)

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DQRID : D020909.2
Start DateStart TimeEnd DateEnd Time
09/06/2002052709/06/20020718
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams:sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the temperature sensor broke shortly after launch. Temperatures are offset 
by approxmiately (but not constantly) 40 degC.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
sgpqmemwrcolC1.c1:
  • Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
sgplssondeC1.c1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)

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DQRID : D021006.1
Start DateStart TimeEnd DateEnd Time
10/03/2002112010/03/20021320
Subject:
Bad temperature sensor
DataStreams:sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the temperture sensor broke a few seconds into flight.  This results in an 
unreasonably low temperature for the rest of the flight.  For some reason, the rh values 
also go missing shortly after launch.  Only the wind and pressure data are reliable.
Measurements:sgpsondewnpnC1.a1:
  • Dummy altitude for Zeb(alt)
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
sgplssondeC1.c1:
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)

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DQRID : D021117.1
Start DateStart TimeEnd DateEnd Time
11/13/2002204411/13/20022205
Subject:
SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The RH data in this sounding is erratic between 2km and 10 km, oscillating between 
reasonable values (~40%RH) and zero.  I certainly doubt that this is a real, heretofore 
unreported, atmospheric phenomenon so I have to conclude that something is probably wrong with 
the sensor.  I have not seen this behavior before.  One would have to look at the 
absolutely raw RH data to explore further.
Measurements:sgpsondewnpnC1.a1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D021121.1
Start DateStart TimeEnd DateEnd Time
11/19/2002142311/19/20021623
11/19/2002172611/19/20021917
11/19/2002202611/19/20022204
Subject:
SGP/SONDE/C1 - Contaminated by interference
DataStreams:sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
These three soundings are contaminated by interference from another radiosonde.  It is not 
clear why; this doesn't usually happen at the CF where the operators are very 
experienced and frequency separation is not usually a problem.
Measurements:sgpsondewnpnC1.a1:
  • Mean Wind Speed(wspd)
  • Dummy altitude for Zeb(alt)
  • V-component(v_wind)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • U-component(u_wind)
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • lon(lon)
  • Retrieved pressure profile(pres)
sgpsondewnpnC1.b1:
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • lat(lat)
  • Ascent Rate(asc)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • Dry bulb temperature(tdry)
sgpsondeC1.00:
  • null(Raw data stream - documentation not supported)

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DQRID : D021123.2
Start DateStart TimeEnd DateEnd Time
11/20/2002022511/20/20020412
Subject:
SGP/SONDE/C1 - Interference CF sounding 20021120:0225
DataStreams:sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
Like several soundings on 11/19, this sounding was affected by interference from another 
radiosonde.
Measurements:sgpsondewnpnC1.a1:
  • Mean Wind Speed(wspd)
  • Dummy altitude for Zeb(alt)
  • V-component(v_wind)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • U-component(u_wind)
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • lon(lon)
  • Retrieved pressure profile(pres)
sgpsondewnpnC1.b1:
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • lat(lat)
  • Ascent Rate(asc)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • Dry bulb temperature(tdry)
sgpsondeC1.00:
  • null(Raw data stream - documentation not supported)

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DQRID : D021201.1
Start DateStart TimeEnd DateEnd Time
11/21/2002113011/21/20021311
Subject:
SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The RH samples in this sounding oscillate between reasonable values (60-80%) and zero.  
This may be a problem with the RH sensor or the software that alternates between the heated 
and non-heated RH elements.  In either case, the reported values are questionable.  More 
investigation of the raw binary data would be required to diagnose further.
Measurements:sgpsondewnpnC1.a1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D060928.3
Start DateStart TimeEnd DateEnd Time
09/28/2006172812/31/99992359
Subject:
SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry
DataStreams:sgpsondewnpnC1.b1
Description:
The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Dummy altitude for Zeb(alt)

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