Data Quality Reports for Session: 118129 User: koontz Completed: 03/12/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
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
D060303.1SGP/SONDE/C1 - DigiCORAIII failed, replaced with S01/S02 launchessgpsondeC1.00, sgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1


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:
  • null(Raw data stream - documentation not supported)

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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:
  • null(Raw data stream - documentation not supported)

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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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