Data Quality Reports for Session: 108634 User: earthsound Completed: 10/29/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D011207.3SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 soundingsgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D011231.1SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D011231.2SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
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
D030114.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030122.1SGP/SONDE/C1 - Broken temperature sensor SGP/CF soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030206.5SGP/SONDE/C1 - Bad temperature/RHsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030330.1SGP/Sonde/C1 - Bad temperature, RHsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030409.1SGP/Sonde/C1 - Bad RH in soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.1SGP/Sonde/C1 - Sondes launched an hour earlysgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.2SGP/Sonde/C1 - Incorrect surface temperature on CF soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.3SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problemssgplssondeC1.c1, sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030419.2SGP/SONDE/C1 - Broken Temperature SensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030427.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030507.3SGP/SONDE/C1 - Broken temperature sensorssgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030614.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030707.7SGP/SONDE/C1 - Incorrect surface RH value.sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030722.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030807.1SGP/SONDE/C1 - A few bad temperature values at the beginning of the soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D031112.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1
D040127.2SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1
D040219.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1
D040219.2SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D040223.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1
D040301.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1
D040415.2SGP/SONDE/C1 - Temperature sensor broke high into the soundingsgpsondewnpnC1.b1
D041005.1SGP/SONDE/C1 - Incorrect surface temperaturesgpsondewnpnC1.b1
D041013.4SGP/SONDE/C1 - Scheduled Soundings MissedsgpsondeC1.00, sgpsondewnpnC1.b1
D050201.1SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry errorsgpsondewnpnC1.b1
D050421.5SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D050510.1SGP/SONDE/C1 - Surface pressure bad and other data noisysgpsondewnpnC1.b1
D050510.2SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D050603.4SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D050725.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1
D050811.5SGP/SONDE/C1 - Bad T/RH and surface P.sgpsondewnpnC1.b1
D050912.2SGP/SONDE/C1 - Temperature/RH incorrectsgplssondeC1.c1, sgpsondewnpnC1.b1
D051027.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1
D051121.1SGP/SONDE/C1 - Sonde RH values incorrectsgpsondewnpnC1.b1
D060208.2SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondessgpsondewnpnC1.b1
D060227.2SGP/SONDE/C1 - Soundings done as part of dual-sonde flightssgpsondewnpnC1.b1
D060303.1SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launchessgpsondeC1.00, sgpsondewnpnC1.b1
D060630.1SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde FilessgpsondewnpnC1.b1
D060928.2SGP/SONDE/C1 - RH values offset due to error in ground checksgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1
D061201.1SGP/SONDE/C1 - RH Sensor failuresgpsondewnpnC1.b1


DQRID : D011207.3
Start DateStart TimeEnd DateEnd Time
12/03/2001232812/04/20010158
Subject:
SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding
DataStreams:sgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It looks as though the temperature sensor was damaged on launch.  The
recorded temp goes from 16.4 at the surface to -42.6 at 2 seconds into the
flight.  The temperature never exceeds -42 though the RH and pressure look
reasonable, but probably should be considered questionable.
Measurements:sgpsondewnpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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)

sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D011231.1
Start DateStart TimeEnd DateEnd Time
12/22/2001052712/22/20010659
Subject:
SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature data in this sounding look bad after the first value.  The
temperature series is 11.4, 2.6, -14.3, -32.4 in the first 6 seconds of
flight.  I don't know why this occurred, but it obviously is incorrect.
The pressure and RH data look 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 : D011231.2
Start DateStart TimeEnd DateEnd Time
12/28/2001232612/29/20010045
Subject:
SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature data in this sounding are bad from approximately 16 seconds
into the flight.  The temperature series is 9.9, 10.8, 11.3, 1.5, 11.6, 11.6,
11.6, -32.2 and remains below -30 degC.  I don't know why this occurred, but
it clearly is incorrect.  The pressure data looks OK as does the RH, though
the RH data are missing (probably sensor failure) above roughly 3.5 km.
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 : 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:
  • Raw data stream - documentation not supported(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:
  • Raw data stream - documentation not supported(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 : D030114.1
Start DateStart TimeEnd DateEnd Time
01/11/2003053601/11/20030551
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The RH values during the first 15 minutes of this sounding oscillate between reasonable 
values and near-zero values.  The oscillation is irregular and seems to be related to 
failure of the RH sensor heating process.  I have informed Vaisala of the problem and provided 
raw data files to them for analysis.
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 : D030122.1
Start DateStart TimeEnd DateEnd Time
01/19/2003113401/19/20031259
Subject:
SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The radiosonde temperature sensor apparently broke during launch.  This results in bad 
temperature, dew point, and rh data.
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 : D030206.5
Start DateStart TimeEnd DateEnd Time
02/02/2003173202/02/20031832
Subject:
SGP/SONDE/C1 - Bad temperature/RH
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch.  All temperature and RH-related data 
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 : D030330.1
Start DateStart TimeEnd DateEnd Time
03/18/2003113203/18/20031322
03/20/2003113103/20/20031140
03/20/2003173103/20/20031904
Subject:
SGP/Sonde/C1 - Bad temperature, RH
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
These three soundings all show the effects of a temperature sensor broken at launch.  The 
temperature, RH, dew-point values all 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 : D030409.1
Start DateStart TimeEnd DateEnd Time
04/06/2003114404/06/20031203
Subject:
SGP/Sonde/C1 - Bad RH in sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The RH sensor heating circuit was out of synch from about 400 sec after launch until the 
circuit was turned off whent he sounding temperature reached approximately 233 degK (-40 
degC) about 1500 sec after launch.  During this time period the reported RH oscillates 
between reasonable values and near-zero values.
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 : D030411.1
Start DateStart TimeEnd DateEnd Time
04/06/2003220004/07/20030700
Subject:
SGP/Sonde/C1 - Sondes launched an hour early
DataStreams:sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It looks like someone forgot to set his/her clock ahead.  The sounding that should have 
been done at 23:30 UTC on 4/6 was done at 22:38 and the following sounding, which should 
have been done at 0530 on 4/7 was done at 04:31.  The subsequent soundings all are done at 
the correct times.
Measurements:sgpsondewnpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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)


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DQRID : D030411.2
Start DateStart TimeEnd DateEnd Time
04/06/2003223804/06/20032238
Subject:
SGP/Sonde/C1 - Incorrect surface temperature on CF sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the operator entered an incorrect value for surface temperature.  Rather 
than 43.2 degC in the file, the value is most likely 19. degC (thwaps reading 19.4, first 
sonde reading aloft 18.6).
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)

sgpsondewnpnC1.b1:
  • Dry bulb temperature(tdry)


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DQRID : D030411.3
Start DateStart TimeEnd DateEnd Time
04/01/2003173004/01/20031930
04/02/2003053004/02/20030730
04/02/2003113004/02/20031330
Subject:
SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems
DataStreams:sgplssondeC1.c1, sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
These sonde launches where unsuccessful due to problems
with the antenna configuration resulting in signal loss
before the launch.
Measurements:sgpsondewnpnC1.a1:
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • U-component(u_wind)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • 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:
  • U-component(u_wind)
  • Mean Wind Speed(wspd)
  • 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:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgplssondeC1.c1:
  • lon(lon)
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • Retrieved pressure profile(pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • lat(lat)
  • Time offset of tweaks from base_time(time_offset)


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DQRID : D030419.2
Start DateStart TimeEnd DateEnd Time
04/15/2003233204/16/20030124
Subject:
SGP/SONDE/C1 - Broken Temperature Sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch as a result all variables that are 
affected by temperature 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)


Back To Table of Contents

DQRID : D030427.1
Start DateStart TimeEnd DateEnd Time
04/18/2003113004/18/20031310
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All temperature-related 
variables (dp, tdry, rh) 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)


Back To Table of Contents

DQRID : D030507.3
Start DateStart TimeEnd DateEnd Time
05/04/2003113005/04/20031145
05/04/2003233005/05/20030116
Subject:
SGP/SONDE/C1 - Broken temperature sensors
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensors broke at launch on both of these soundings.  All of the 
temperature-related data (tdry, rh, dp) 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 : D030614.1
Start DateStart TimeEnd DateEnd Time
06/09/2003173006/09/20031737
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor broke at launch on this sounding.  All of the temperature-related 
data (tdry, rh, dp) 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 : D030707.7
Start DateStart TimeEnd DateEnd Time
06/22/2003233106/22/20032331
Subject:
SGP/SONDE/C1 - Incorrect surface RH value.
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The surface RH value, reported as 0%RH should be 52%.  This resulted from a typographical 
error by the operator when entering the surface data.
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)


Back To Table of Contents

DQRID : D030722.1
Start DateStart TimeEnd DateEnd Time
07/19/2003173007/19/20031930
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor broke at launch on this sounding.  All of the temperature-related 
data (tdry, rh, dp) 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 : D030807.1
Start DateStart TimeEnd DateEnd Time
08/02/2003172508/02/20031726
Subject:
SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
I've never seen this before.  The temperature reported by the radiosonde dropped over 30 
degC just after launch (usually a symptom of a broken temperature sensor), but then 
recovered after 14 seconds of bad readings.  The temperatures from 2 seconds through 14 seconds 
after launch are incorrect, the remainder of the sounding looks fine.  I have sent the 
data files to Vaisala for their consideration.
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 : D031112.1
Start DateStart TimeEnd DateEnd Time
11/01/2003113311/01/20031315
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor broke at launch on this sounding.  All of the temperature-related 
data (tdry, rh, dp) are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D040127.2
Start DateStart TimeEnd DateEnd Time
01/16/2004201501/16/20042151
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams:sgpsondewnpnC1.b1
Description:
The RH values during the first half of this sounding oscillate between reasonable values 
and near-zero values.  The oscillation is irregular and seems to be related to failure of 
the RH sensor heating process.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D040219.1
Start DateStart TimeEnd DateEnd Time
02/09/2004053002/09/20040601
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams:sgpsondewnpnC1.b1
Description:
The RH values during the first part of this sounding oscillate between reasonable values 
and near-zero values.  The oscillation seems to be related to failure of the RH sensor 
heating process.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D040219.2
Start DateStart TimeEnd DateEnd Time
02/02/2004053002/02/20040826
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently transposed to digits when entering the surface 
pressure value.  The value entered is 987.0 hPa but the value shown in the raw data file at 
launch is 978.0.  As a result, the absolute altitudes in this sounding will be slightly 
incorrect as will be the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)


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DQRID : D040223.1
Start DateStart TimeEnd DateEnd Time
02/19/2004174602/19/20041946
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor broke at launch on this sounding.  All of the temperature-related 
data (tdry, rh, dp) are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D040301.1
Start DateStart TimeEnd DateEnd Time
02/27/2004053102/27/20040721
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch on this sounding.  All of the 
temperature-related data (tdry, rh, dp) are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D040415.2
Start DateStart TimeEnd DateEnd Time
04/13/2004122904/13/20041301
Subject:
SGP/SONDE/C1 - Temperature sensor broke high into the sounding
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor on this radiosonde appeared to break 56 minutes and 22 seconds into 
the sounding at an altitude of 16570 m.  All the data below this point are good; only 
the data above this point to the end of the sounding (88 minutes and 14 seconds) are bad.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D041005.1
Start DateStart TimeEnd DateEnd Time
10/02/2004113010/02/20041131
Subject:
SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:sgpsondewnpnC1.b1
Description:
The operator entered a the surface temperature incorrectly on this sounding.  The sonde 
data file shows the temperature as 33.5 degC but the operations log shows it as 3.5 degC.  
The first temperature recorded by the sonde after launch is 3.7 degC, consistent with the 
typical early morning inversion.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D041013.4
Start DateStart TimeEnd DateEnd Time
01/16/2004233001/17/20041830
01/18/2004053001/18/20040630
01/21/2004053001/21/20040630
Subject:
SGP/SONDE/C1 - Scheduled Soundings Missed
DataStreams:sgpsondeC1.00, sgpsondewnpnC1.b1
Description:
The following scheduled sonde launches were missed due to computer 
system failures:

20040116.2330
20040117.0530
20040117.1130
20040117.1730
20040118.0530
20040121.0530
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • Ascent Rate(asc)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • lon(lon)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)

sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D050201.1
Start DateStart TimeEnd DateEnd Time
01/19/2005053101/19/20050706
Subject:
SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry error
DataStreams:sgpsondewnpnC1.b1
Description:
There is a discrepency between the surface pressure and temperature data entered by the 
operator and that recorded by the THWAPS.  Review of the raw data from the radiosonde shows 
that the pressure was periodically varying by as much as 12 hPa (~988 to 1000)in the 
time period before launch.  The operator entry of 998.2 is at the high end of this range - 
the concurrent THWAPS reading was about 988.4 at the low end.  The operator entered 
temperature 6.2 degC is considerably higher than the THWAPS value of 1.8.  The pre-flight log 
entry for this sounding is missing from the OMIS database.  If not for the extremely 
unstable pressure reading I would have assumed this was an operator error.  It will take some 
more research to figure out what is going on.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • Ascent Rate(asc)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • lon(lon)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)


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DQRID : D050421.5
Start DateStart TimeEnd DateEnd Time
04/11/2005174904/11/20051920
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently entered an incorrect surface pressure value.  The 
value entered is 988.8 hPa but the value shown in the raw data file at launch is 968.8.  As a 
result, the absolute altitudes in this sounding will be slightly incorrect as will be 
the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)


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DQRID : D050510.1
Start DateStart TimeEnd DateEnd Time
04/26/2005172604/26/20051910
Subject:
SGP/SONDE/C1 - Surface pressure bad and other data noisy
DataStreams:sgpsondewnpnC1.b1
Description:
I was checking this sounding because the surface pressure entered by the operator was 
considerably higher than that recorded by the TWHAPS and SMOS.  I'm not sure why, but the 
pressure data are very noisy while the sonde is on the ground (which accounts for the 
incorrect surface pressure) and the RH data aloft do not look terrible but do not look great 
either.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • Ascent Rate(asc)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • lon(lon)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)


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DQRID : D050510.2
Start DateStart TimeEnd DateEnd Time
04/29/2005232904/30/20050111
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently typed an 89 instead of a 78 when entering the surface 
pressure value.  The value entered is 989.9 hPa but the value shown in the raw data file 
at launch is 978.9.  As a result, the absolute altitudes in this sounding will be 
slightly incorrect as will be the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)


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DQRID : D050603.4
Start DateStart TimeEnd DateEnd Time
05/11/2005053005/11/20050750
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently mistyped a digit when entering the surface pressure 
value.  The value entered is 975.6 hPa but the value shown in the raw data file at launch 
is 972.6.  As a result, the absolute altitudes in this sounding will be slightly incorrect 
as will be the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)


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DQRID : D050725.1
Start DateStart TimeEnd DateEnd Time
07/17/2005234707/18/20050141
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams:sgpsondewnpnC1.b1
Description:
The RH values below 6 km are incorrect.  The problem relates to a failure of the GC25 
ground check set used before this particular sounding.  The failure seems to have affected 
the sensor calibration with the effect that one of the two sensors was reading artificially 
high.  Because the internal processing software uses the highest of the two sensor 
readings, the bad sensor value is chosen whenever it is not heated.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D050811.5
Start DateStart TimeEnd DateEnd Time
08/01/2005113208/01/20050116
Subject:
SGP/SONDE/C1 - Bad T/RH and surface P.
DataStreams:sgpsondewnpnC1.b1
Description:
Apparently multiple failures.  The radiosonde temperature sensor broke on launch causing 
an approximate 35 degC negative offset and as a result, the RH is incorrect.  Furthermore, 
it appears that the pressure sensor was off by approximately 4 hPa, though this would 
not affect the altitude calculation, the absolute pressure is wrong.
Measurements:sgpsondewnpnC1.b1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)


Back To Table of Contents

DQRID : D050912.2
Start DateStart TimeEnd DateEnd Time
09/09/2005113209/09/20051332
Subject:
SGP/SONDE/C1 - Temperature/RH incorrect
DataStreams:sgplssondeC1.c1, sgpsondewnpnC1.b1
Description:
The temperature throughout this sounding is too high and as a result the RH values will be 
incorrect as well.  I'm not sure what is wrong here but the operators noted reasonable 
values (18.1 degC, 87%) in the log before launch.  Review of the raw data, however, shows 
the sonde reporting temperatures nearly 20 degC higher.  I suppose it is possible that 
the operator entered into the log the reference temperature from the GC25 ground check set 
rather than the temperature reported by the sonde - I can't think of any other 
explanation - there is no doubt that the temperature sensor on this sonde was bad.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

sgplssondeC1.c1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)


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DQRID : D051027.1
Start DateStart TimeEnd DateEnd Time
10/24/2005114010/24/20051204
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams:sgpsondewnpnC1.b1
Description:
The RH values during this sounding oscillate between reasonable values and near-zero 
values.  The oscillation is due to failure of the RH sensor heating process.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D051121.1
Start DateStart TimeEnd DateEnd Time
04/13/2005234604/15/20051732
Subject:
SGP/SONDE/C1 - Sonde RH values incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
RH values for all sondes launched during this time were incorrect due to a faulty Ground 
Check set which damaged or conditioned the RH sensor improperly.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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DQRID : D060208.2
Start DateStart TimeEnd DateEnd Time
02/10/2006000012/31/20062359
Subject:
SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes
DataStreams:sgpsondewnpnC1.b1
Description:
Because of a manufacturer's production problem, we will be using both RS92-SGP (GPS 
windfinding and RS92-KL (Loran windfinding) radiosondes at the SGP/CF starting February 10, 
2006.  The radiosonde type used for the each sounding may be determined by looking the 
metadata variable "launch_status" in the netCDF data files.
Measurements:sgpsondewnpnC1.b1:
  • lon(lon)
  • U-component(u_wind)
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • lat(lat)
  • Wind Direction(deg)
  • Wind Status(wstat)


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DQRID : D060227.2
Start DateStart TimeEnd DateEnd Time
02/22/2006000002/27/20060000
Subject:
SGP/SONDE/C1 - Soundings done as part of dual-sonde flights
DataStreams:sgpsondewnpnC1.b1
Description:
The following soundings done during the subject time period were flown in dual-sonde mode 
in which the standard ARM RS92 radiosonde was attached to the same balloon with a NASA 
ATR (atmospheric temperature reference) radiosonde.  The radiosondes were separated by a 6' 
styrofoam bar.  To accommodate the additional weight, we used 1200g balloons rather than 
350g balloons.  Accordingly, we want to alert users that these soundings may reach 
higher altitudes than normal for ARM soundings and that the ascent rate may be somewhat 
higher.  The following soundings are affected:

Sequence  Date    UTC launch time
    1     2/22        0530
    2     2/22        1730
    3     2/22        2330 <---- No data: launch failure    
    4     2/23        0230
    5     2/23        0530
    6     2/23        1730    
    7     2/23        2030
    8     2/23        2330
    9     2/24        2330
   10     2/25        0215
   11     2/25        0509    
   12     2/25        1730
   13     2/25        1930
   14     2/25        2300
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • Ascent Rate(asc)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • lon(lon)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)


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DQRID : D060303.1
Start DateStart TimeEnd DateEnd Time
01/17/2004233101/18/20040108
01/18/2004113801/18/20041252
01/18/2004172901/18/20041852
01/18/2004233901/19/20040111
01/19/2004053101/19/20040711
01/19/2004113601/19/20041316
01/19/2004172301/19/20041752
01/19/2004233101/20/20040101
01/20/2004053101/20/20040703
01/20/2004113201/20/20041332
01/20/2004172801/20/20041928
01/20/2004233001/21/20040130
01/21/2004173101/21/20041931
Subject:
SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launches
DataStreams:sgpsondeC1.00, sgpsondewnpnC1.b1
Description:
The digiCORA-III failed on Saturday 2004-01-17.  The operators reported that they were 
unable to load the software and conduct normal soundings.	Following procedure, they 
conducted the regular soundings by using the S01/S02 systems as allowed by the AIRS IOP schedule.
The netCDF header fields "input_source" and "facility_id" will mention which of the 
S01/S02 systems was used in these launches.
Measurements:sgpsondewnpnC1.b1:
  • lon(lon)
  • lat(lat)
  • Dummy altitude for Zeb(alt)

sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D060630.1
Start DateStart TimeEnd DateEnd Time
06/17/2006000006/21/20062359
Subject:
SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde Files
DataStreams:sgpsondewnpnC1.b1
Description:
The wind finding hardware failed so that no wind or latitude/longitude data was collected 
on the launches for these days.
Measurements:sgpsondewnpnC1.b1:
  • lon(lon)
  • U-component(u_wind)
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • lat(lat)
  • Wind Status(wstat)


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DQRID : D060928.2
Start DateStart TimeEnd DateEnd Time
08/27/2006233209/25/20061600
Subject:
SGP/SONDE/C1 - RH values offset due to error in ground check
DataStreams:sgpsondewnpnC1.b1
Description:
Background: After installation of the latest software update , we began performing formal 
ground checks on RS92 radiosondes.  By comparing the
radiosonde readings with reference values in a controlled environment, the
ground check is intended to ensure that the radiosonde sensors are in
calibration before launch.  The radisonde values during the ground check
process are recorded automatically; the reference values are entered by the
operator.  If the radiosonde readings vary from the reference values, the
system 'corrects' the radiosonde values.  In the case of RH, the correction
is applied as an offset (true RH = indicated RH + correction).

Problem: Some operators misunderstood the ground-check procedure and entered the 
radiosonde values of RH rather than the reference value (assumed 0%RH), thus, some soundings done 
during this period have RH values that are different from what they would be if the 
ground check procedure had been done correctly.

Consequence:  Because the RH corrections generally are small (averaging
about 0.5% RH) and the precision of the reported RH data during this time
period is 1% RH, some values will not be affected at all; others will be off by about 1% 
RH (still within the stated accuracy of the sensor). 
Furthermore, because entering the radiosonde value as the reference value
results in a near zero 'correction,' one may view these soundings as being
done without the ground check correction.  Also note that the dew point
value will be suspect as well.

I am attaching below a listing of the soundings that were affected during the indicated 
time period.  Users can see the magnitude of the problem and choose whether or not to apply 
an offset in RH.  Note that application of the offset to the processed RH data (in the 
netCDF file) will not have the same effect of applying the correction to the absolutely 
raw data (before processing), but the differences should be insignificant.  Also note that 
the corrections for each sounding are included in the netCDF header information.  These 
attributes are named 'humidity_correction' and 'humidity_correction_2'.  The values of RH 
indicated by the radiosonde while it is in the ground check set are in attributes 
'humidity_gc_sonde' and 'humidity_gc_sonde_2.'  There is an RH reading for each of the two RH 
sensors used in the RS92 radiosonde.

Here is the list - RH1 and RH2 are the radiosonde readings in the ground
check set.  Ref is the reference value entered by the operator.  The
correcte reference value should be 0%.  To obtain an approximation to the RH value that 
would have been recorded if the ground check had been done
properly, subtract the Ref value from the indicated RH.

 YYYYMMDD  HHMM  SerialN      RH1     RH2     Ref
 20060827  2332  B2624322    1.00    1.00    1.00
 20060828  1731  B2634078    1.00    1.00    1.00
 20060828  2332  B2624380    3.00    3.00    2.00
 20060909  2331  B2615266    1.00    1.00    1.00
 20060915  1759  B2914012    1.00    1.00    1.00
 20060919  2350  B2825128    1.00    1.00    1.00
 20060920  1800  B2825088    1.00    1.00    1.00
 20060920  2346  B2815633    1.00    1.00    1.00
 20060921  1728  B2834732    1.30    1.30    1.30
 20060921  2330  B2825042    1.50    1.50    1.50
 20060922  0527  B2825043    1.70    1.80    1.70
 20060922  1128  B2825031    1.60    1.50    1.60
 20060922  1729  B2834437    1.50    1.50    1.50
 20060922  2330  B2825040    0.40    0.50    0.50
 20060923  0529  B2834733    0.30    0.30    0.30
 20060923  1128  B2825026    0.40    0.40    0.40
 20060923  1729  B2825064    0.60    0.70    0.60
 20060923  2330  B2825041    0.40    0.50    0.50
 20060924  0529  B2825039    0.30    0.30    0.30
 20060924  1729  B2825025    0.20    0.30    0.20
 20060924  2329  B2825032    0.30    0.40    0.40
 20060925  0529  B2824234    0.20    0.30    0.20
Measurements: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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DQRID : D061201.1
Start DateStart TimeEnd DateEnd Time
11/27/2006233111/28/20060056
Subject:
SGP/SONDE/C1 - RH Sensor failure
DataStreams:sgpsondewnpnC1.b1
Description:
The differences between the two RH sensors on this sonde are unreasonably high (~20%).  As 
a result the reported RH values oscillate by this amount during the times the sensors 
are alternately heated.  After the heating stops, the reported RH comes from the sensor 
reading the higher value.  There is no way of knowing if this is the correct value.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)


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