Data Quality Reports for Session: 185041 User: roches1 Completed: 04/13/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D011207.3SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 soundingsgpsondewnpnC1.b1Incorrect
D011231.1SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527sgpsondewnpnC1.b1Incorrect
D011231.2SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326sgpsondewnpnC1.b1Incorrect
D020110.1SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528sgpsondewnpnC1.b1Incorrect
D020524.27SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RHsgpsondewnpnC1.b1Incorrect
D020526.1SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129sgpsondewnpnC1.b1Incorrect
D020611.2SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etcsgpsondewnpnC1.b1Incorrect
D020626.34SGP/SONDE/C1 - Incorrect Surface PressuresgpsondewnpnC1.b1Incorrect
D020626.35SGP/SONDE/C1 - Bad Temperature SensorsgpsondewnpnC1.b1Incorrect
D020703.1SGP/SONDE/C1 - Temperature sensor failuresgpsondewnpnC1.b1Incorrect
D020909.1SGP/SONDE/C1 - Bad Temperature SensorsgpsondewnpnC1.b1Incorrect
D020909.2SGP/SONDE/C1 - Bad Temperature SensorsgpsondewnpnC1.b1Incorrect
D021006.1Bad temperature sensorsgpsondewnpnC1.b1Incorrect
D021117.1SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044sgpsondewnpnC1.b1Suspect
D021121.1SGP/SONDE/C1 - Contaminated by interferencesgpsondewnpnC1.b1Suspect
D021123.2SGP/SONDE/C1 - Interference CF sounding 20021120:0225sgpsondewnpnC1.b1Suspect
D021201.1SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130sgpsondewnpnC1.b1Suspect
D030114.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1Incorrect
D030122.1SGP/SONDE/C1 - Broken temperature sensor SGP/CF soundingsgpsondewnpnC1.b1Incorrect
D030206.5SGP/SONDE/C1 - Bad temperature/RHsgpsondewnpnC1.b1Incorrect
D030330.1SGP/Sonde/C1 - Bad temperature, RHsgpsondewnpnC1.b1Incorrect
D030409.1SGP/Sonde/C1 - Bad RH in soundingsgpsondewnpnC1.b1Incorrect
D030411.1SGP/Sonde/C1 - Sondes launched an hour earlysgpsondewnpnC1.b1Does not affect quality
D030411.2SGP/Sonde/C1 - Incorrect surface temperature on CF soundingsgpsondewnpnC1.b1Incorrect
D030411.3SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problemssgpsondewnpnC1.b1Missing
D030419.2SGP/SONDE/C1 - Broken Temperature SensorsgpsondewnpnC1.b1Incorrect
D030427.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D030507.3SGP/SONDE/C1 - Broken temperature sensorssgpsondewnpnC1.b1Incorrect
D030614.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D030707.7SGP/SONDE/C1 - Incorrect surface RH value.sgpsondewnpnC1.b1Incorrect
D030722.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D030807.1SGP/SONDE/C1 - A few bad temperature values at the beginning of the soundingsgpsondewnpnC1.b1Incorrect
D031112.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D040127.2SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1Incorrect
D040219.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1Incorrect
D040219.2SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1Incorrect
D040223.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D040301.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1Incorrect
D040415.2SGP/SONDE/C1 - Temperature sensor broke high into the soundingsgpsondewnpnC1.b1Incorrect
D041005.1SGP/SONDE/C1 - Incorrect surface temperaturesgpsondewnpnC1.b1Incorrect
D041013.4SGP/SONDE/C1 - Scheduled Soundings MissedsgpsondewnpnC1.b1Missing
D050201.1SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry errorsgpsondewnpnC1.b1Suspect
D050421.5SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1Incorrect
D050510.1SGP/SONDE/C1 - Surface pressure bad and other data noisysgpsondewnpnC1.b1Suspect
D050510.2SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1Incorrect
D050603.4SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1Incorrect
D050725.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1Incorrect
D050811.5SGP/SONDE/C1 - Bad T/RH and surface P.sgpsondewnpnC1.b1Incorrect
D050912.2SGP/SONDE/C1 - Temperature/RH incorrectsgpsondewnpnC1.b1Incorrect
D051027.1SGP/SONDE/C1 - Bad RH DatasgpsondewnpnC1.b1Incorrect
D051121.1SGP/SONDE/C1 - Sonde RH values incorrectsgpsondewnpnC1.b1Incorrect
D060208.2SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondessgpsondewnpnC1.b1Does not affect quality
D060227.2SGP/SONDE/C1 - Soundings done as part of dual-sonde flightssgpsondewnpnC1.b1Does not affect quality
D060303.1SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launchessgpsondewnpnC1.b1Does not affect quality
D060630.1SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde FilessgpsondewnpnC1.b1Does not affect quality
D060928.2SGP/SONDE/C1 - RH values offset due to error in ground checksgpsondewnpnC1.b1Suspect
D061201.1SGP/SONDE/C1 - RH Sensor failuresgpsondewnpnC1.b1Suspect
D080829.2SGP/SONDE/C1 - Suspect RH profile from 150-350 m above ground levelsgpsondewnpnC1.b1Suspect
D090224.3SGP/SONDE/C1 - Suspect RH valuessgpsondewnpnC1.b1Suspect
D100803.3SGP/SONDE/C1 - Sensor failuresgpsondewnpnC1.b1Incorrect
D130617.4SGP/SONDE/C1 - Missing WS/WD/Lat/LonsgpsondewnpnC1.b1Missing
D140313.1SGP/SONDE/C1 - Wind, lat/lon data missingsgpsondewnpnC1.b1Missing
D140313.2SGP/SONDE/C1 - Wind speed/dir missing surface to 450mbsgpsondewnpnC1.b1Missing
D150422.1SGP/SONDE/C1 - RH sensor failuresgpsondewnpnC1.b1Incorrect
D160104.7SGP Site Power Outage Due to Winter StormsgpsondewnpnC1.b1Does not affect quality
D160317.9SGP/SONDE/C1 - Instrument Winds/Lat-Lon MissingsgpsondewnpnC1.b1Missing
D170206.2SGP/SONDE/C1 - Ice StormsgpsondewnpnC1.b1Missing
D170403.3SGP/SONDE/C1 - InstrumentsgpsondewnpnC1.b1Missing


DQRID : D011207.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/03/2001232812/04/20010158Incorrect
Subject:
SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D011231.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/22/2001052712/22/20010659Incorrect
Subject:
SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)


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DQRID : D011231.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/28/2001232612/29/20010045Incorrect
Subject:
SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)


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DQRID : D020110.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/08/2002052801/08/20020714Incorrect
Subject:
SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)


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DQRID : D020524.27
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/22/2002113005/22/20021347Incorrect
Subject:
SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH
DataStreams: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.b1:
  • Altitude above mean sea level(alt)
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • asc


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DQRID : D020526.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/23/2002112905/23/20021322Incorrect
Subject:
SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129
DataStreams: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.b1:
  • Altitude above mean sea level(alt)
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • asc


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DQRID : D020611.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/09/2002022906/09/20020236Incorrect
Subject:
SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc
DataStreams: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.b1:
  • Altitude above mean sea level(alt)
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • asc


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DQRID : D020626.34
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/17/2002112806/17/20021313Incorrect
Subject:
SGP/SONDE/C1 - Incorrect Surface Pressure
DataStreams: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.b1:
  • Altitude above mean sea level(alt)
  • asc


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DQRID : D020626.35
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/19/2002232906/20/20020036Incorrect
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D020703.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/27/2002172806/27/20021908Incorrect
Subject:
SGP/SONDE/C1 - Temperature sensor failure
DataStreams:sgpsondewnpnC1.b1
Description:
Temperature sensor broke at launch.  All temperature-related variables
are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D020909.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/06/2002172709/06/20021854Incorrect
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D020909.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/06/2002052709/06/20020718Incorrect
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D021006.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/03/2002112010/03/20021320Incorrect
Subject:
Bad temperature sensor
DataStreams: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.b1:
  • Altitude above mean sea level(alt)
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • asc


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DQRID : D021117.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/13/2002204411/13/20022205Suspect
Subject:
SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D021121.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/19/2002172611/19/20021917Suspect
11/19/2002142311/19/20021623Suspect
11/19/2002202611/19/20022204Suspect
Subject:
SGP/SONDE/C1 - Contaminated by interference
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D021123.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/20/2002022511/20/20020412Suspect
Subject:
SGP/SONDE/C1 - Interference CF sounding 20021120:0225
DataStreams:sgpsondewnpnC1.b1
Description:
Like several soundings on 11/19, this sounding was affected by interference from another 
radiosonde.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D021201.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/21/2002113011/21/20021311Suspect
Subject:
SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030114.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/11/2003053601/11/20030551Incorrect
Subject:
SGP/SONDE/C1 - Bad RH Data
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030122.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/19/2003113401/19/20031259Incorrect
Subject:
SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding
DataStreams:sgpsondewnpnC1.b1
Description:
The radiosonde temperature sensor apparently broke during launch.  This results in bad 
temperature, dew point, and rh data.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030206.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/02/2003173202/02/20031832Incorrect
Subject:
SGP/SONDE/C1 - Bad temperature/RH
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch.  All temperature and RH-related data 
are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030330.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/18/2003113203/18/20031322Incorrect
03/20/2003173103/20/20031904Incorrect
03/20/2003113103/20/20031140Incorrect
Subject:
SGP/Sonde/C1 - Bad temperature, RH
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030409.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/06/2003114404/06/20031203Incorrect
Subject:
SGP/Sonde/C1 - Bad RH in sounding
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030411.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/06/2003220004/07/20030700Does not affect quality
Subject:
SGP/Sonde/C1 - Sondes launched an hour early
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D030411.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/06/2003223804/06/20032238Incorrect
Subject:
SGP/Sonde/C1 - Incorrect surface temperature on CF sounding
DataStreams: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.b1:
  • Dry bulb temperature(tdry)


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DQRID : D030411.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/01/2003173004/01/20031930Missing
04/02/2003053004/02/20030730Missing
04/02/2003113004/02/20031330Missing
Subject:
SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems
DataStreams:sgpsondewnpnC1.b1
Description:
These sonde launches where unsuccessful due to problems
with the antenna configuration resulting in signal loss
before the launch.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D030419.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/15/2003233204/16/20030124Incorrect
Subject:
SGP/SONDE/C1 - Broken Temperature Sensor
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch as a result all variables that are 
affected by temperature are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030427.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/18/2003113004/18/20031310Incorrect
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All temperature-related 
variables (dp, tdry, rh) are incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030507.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/04/2003233005/05/20030116Incorrect
05/04/2003113005/04/20031145Incorrect
Subject:
SGP/SONDE/C1 - Broken temperature sensors
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030614.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/09/2003173006/09/20031737Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030707.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/22/2003233106/22/20032331Incorrect
Subject:
SGP/SONDE/C1 - Incorrect surface RH value.
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030722.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/19/2003173007/19/20031930Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D030807.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/02/2003172508/02/20031726Incorrect
Subject:
SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding
DataStreams: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.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)


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DQRID : D031112.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/01/2003113311/01/20031315Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D040127.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/16/2004201501/16/20042151Incorrect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D040219.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/09/2004053002/09/20040601Incorrect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D040219.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/02/2004053002/02/20040826Incorrect
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:
  • Altitude above mean sea level(alt)
  • asc


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DQRID : D040223.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/19/2004174602/19/20041946Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D040301.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/27/2004053102/27/20040721Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D040415.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/13/2004122904/13/20041301Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D041005.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/02/2004113010/02/20041131Incorrect
Subject:
SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:sgpsondewnpnC1.b1
Description:
The operator entered 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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D041013.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/18/2004053001/18/20040630Missing
01/21/2004053001/21/20040630Missing
01/16/2004233001/17/20041830Missing
Subject:
SGP/SONDE/C1 - Scheduled Soundings Missed
DataStreams: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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D050201.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/19/2005053101/19/20050706Suspect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D050421.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/11/2005174904/11/20051920Incorrect
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:
  • Altitude above mean sea level(alt)
  • asc


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DQRID : D050510.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/26/2005172604/26/20051910Suspect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D050510.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/29/2005232904/30/20050111Incorrect
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:
  • Altitude above mean sea level(alt)
  • asc


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DQRID : D050603.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/11/2005053005/11/20050750Incorrect
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:
  • Altitude above mean sea level(alt)
  • asc


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DQRID : D050725.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/17/2005234707/18/20050141Incorrect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D050811.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/01/2005113208/01/20051316Incorrect
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)


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DQRID : D050912.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/09/2005113209/09/20051332Incorrect
Subject:
SGP/SONDE/C1 - Temperature/RH incorrect
DataStreams: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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D051027.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/24/2005114010/24/20051204Incorrect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D051121.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/13/2005234604/15/20051732Incorrect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D060208.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/10/2006000012/31/20062359Does not affect quality
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:
  • wstat
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D060227.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/22/2006000002/27/20060000Does not affect quality
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:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D060303.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/18/2004233901/19/20040111Does not affect quality
01/20/2004113201/20/20041332Does not affect quality
01/20/2004053101/20/20040703Does not affect quality
01/19/2004233101/20/20040101Does not affect quality
01/21/2004173101/21/20041931Does not affect quality
01/19/2004053101/19/20040711Does not affect quality
01/20/2004233001/21/20040130Does not affect quality
01/19/2004113601/19/20041316Does not affect quality
01/18/2004172901/18/20041852Does not affect quality
01/17/2004233101/18/20040108Does not affect quality
01/20/2004172801/20/20041928Does not affect quality
01/18/2004113801/18/20041252Does not affect quality
01/19/2004172301/19/20041752Does not affect quality
Subject:
SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launches
DataStreams: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:
  • Altitude above mean sea level(alt)
  • East longitude(lon)
  • North latitude(lat)


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DQRID : D060630.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/17/2006000006/21/20062359Does not affect quality
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:
  • wstat
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D060928.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/27/2006233209/25/20061600Suspect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D061201.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/27/2006233111/28/20060056Suspect
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:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D080829.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/02/2006113509/02/20061435Suspect
08/13/2006230008/13/20062359Suspect
08/06/2006110008/06/20061800Suspect
08/25/2006113608/25/20061436Suspect
09/03/2006113009/03/20061430Suspect
09/02/2006173409/02/20062034Suspect
09/13/2006113109/13/20061431Suspect
08/14/2006110008/14/20061200Suspect
09/11/2006053209/11/20060832Suspect
09/04/2006173109/04/20062031Suspect
08/28/2006053308/28/20060833Suspect
09/04/2006113409/04/20061434Suspect
09/03/2006173009/03/20062030Suspect
08/26/2006113408/26/20061434Suspect
08/12/2006110008/12/20062359Suspect
09/05/2006113109/05/20061431Suspect
09/03/2006053409/03/20060834Suspect
09/12/2006113109/12/20061431Suspect
09/14/2006113109/14/20061431Suspect
08/16/2006110008/16/20061200Suspect
Subject:
SGP/SONDE/C1 - Suspect RH profile from 150-350 m above ground level
DataStreams:sgpsondewnpnC1.b1
Description:
Several radiosondes were noticed to have a very stark dry layer between 150 m and 350 m, 
where the RH dropped from approximately 60-80% (which I would take as close to the ambient 
conditions) to less than 2%.  The character of these dropouts look like instrument 
issues, as it only a handful of radiosondes that appear to be affected.  The quicklook images 
from the Raman lidar does not show any very dry layers, thus supporting the hypothesis 
that the RH measurements from these radiosondes (at least in this small ~200 m level) are 
in error.  I should note that the temperature profiles look normal.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D090224.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/06/2009173001/06/20091914Suspect
Subject:
SGP/SONDE/C1 - Suspect RH values
DataStreams:sgpsondewnpnC1.b1
Description:
RH values only are suspect for the duration of this radiosonde flight, exhibiting a 
"sawtooth" pattern.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D100803.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/12/2002053306/12/20020533Incorrect
Subject:
SGP/SONDE/C1 - Sensor failure
DataStreams:sgpsondewnpnC1.b1
Description:
Temperature sensor failure on sonde.  Data is incorrect, do not use.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D130617.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/07/2013234206/07/20132342Missing
Subject:
SGP/SONDE/C1 - Missing WS/WD/Lat/Lon
DataStreams:sgpsondewnpnC1.b1
Description:
This launch is missing wind speed, wind direction, latitude, and longitude data.
Measurements:sgpsondewnpnC1.b1:
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D140313.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/09/2014052903/09/20140647Missing
Subject:
SGP/SONDE/C1 - Wind, lat/lon data missing
DataStreams:sgpsondewnpnC1.b1
Description:
It appears the GPS-derived data (wind speed, wind direction, lat, lon) is missing due to a 
failure of the GPS components on the radiosonde.  Data is missing and not recoverable.
Measurements:sgpsondewnpnC1.b1:
  • wstat
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D140313.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/10/2014053003/10/20140559Missing
Subject:
SGP/SONDE/C1 - Wind speed/dir missing surface to 450mb
DataStreams:sgpsondewnpnC1.b1
Description:
Wind speed and direction are missing between surface and 450mb.
Measurements:sgpsondewnpnC1.b1:
  • Wind speed, surface, 1-min avg(wspd)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D150422.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/16/2015232804/17/20150043Incorrect
Subject:
SGP/SONDE/C1 - RH sensor failure
DataStreams:sgpsondewnpnC1.b1
Description:
One or both of the RH sensors failed during this flight.  RH and dew point data is 
incorrect.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Humidity, relative, at 21-m height, 30-min avg(rh)


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DQRID : D160104.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/26/2015000001/01/20162359Does not affect quality
Subject:
SGP Site Power Outage Due to Winter Storm
DataStreams:sgpsondewnpnC1.b1
Description:
On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.
Measurements:sgpsondewnpnC1.b1:
  • Dewpoint Temperature(dp)
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • Altitude above mean sea level(alt)
  • wstat
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)


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DQRID : D160317.9
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/02/2016174502/02/20161857Missing
02/11/2016172802/11/20161856Missing
02/16/2016113002/16/20161200Missing
02/05/2016173102/05/20161811Missing
01/24/2016180801/24/20161845Missing
02/12/2016172602/12/20161844Missing
01/30/2016175701/30/20161904Missing
02/09/2016172702/09/20161839Missing
02/07/2016172702/07/20161837Missing
02/04/2016173702/04/20161843Missing
01/23/2016181201/23/20161849Missing
01/20/2016182501/20/20161842Missing
02/13/2016113202/13/20161159Missing
01/27/2016180801/27/20161845Missing
01/29/2016180001/29/20161858Missing
02/03/2016174102/03/20161826Missing
02/06/2016173802/06/20161833Missing
01/28/2016180301/28/20161824Missing
01/19/2016182801/19/20161829Missing
02/01/2016174802/01/20161849Missing
01/26/2016181201/26/20161850Missing
01/21/2016182101/21/20161907Missing
Subject:
SGP/SONDE/C1 - Instrument Winds/Lat-Lon Missing
DataStreams:sgpsondewnpnC1.b1
Description:
Unknown issues caused GPS derived quantities to be missing for the time periods listed.  
Wind speed, direction, u and v components, and lat/lon missing
Measurements:sgpsondewnpnC1.b1:
  • qc_deg
  • qc_wspd
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • qc_v_wind
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)
  • qc_u_wind


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DQRID : D170206.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/13/2017233001/15/20172322Missing
Subject:
SGP/SONDE/C1 - Ice Storm
DataStreams:sgpsondewnpnC1.b1
Description:
Due to local ice storm, radiosonde launches were halted.  Data not available.
Measurements:sgpsondewnpnC1.b1:
  • qc_deg
  • qc_dp
  • Dewpoint Temperature(dp)
  • qc_v_wind
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • qc_rh
  • qc_pres
  • qc_tdry
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)
  • qc_time
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • time
  • Altitude above mean sea level(alt)
  • wstat
  • qc_asc
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • qc_wspd
  • qc_u_wind


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DQRID : D170403.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/13/2017110003/15/20171437Missing
Subject:
SGP/SONDE/C1 - Instrument
DataStreams:sgpsondewnpnC1.b1
Description:
REQUIRED
Measurements:sgpsondewnpnC1.b1:
  • qc_deg
  • qc_dp
  • Dewpoint Temperature(dp)
  • qc_v_wind
  • asc
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • qc_rh
  • qc_pres
  • qc_tdry
  • Wind speed, W-to-E component, at altitude, 915 MHz RWP(u_wind)
  • qc_time
  • Dry bulb temperature(tdry)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • base_time
  • Wind Direction(deg)
  • Wind speed, S-to-N component, at altitude, derived from ETA model(v_wind)
  • North latitude(lat)
  • time_offset
  • time
  • Altitude above mean sea level(alt)
  • wstat
  • qc_asc
  • Humidity, relative, at 21-m height, 30-min avg(rh)
  • qc_wspd
  • qc_u_wind


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END OF DATA