Data Quality Reports for Session: 104062 User: jcomstock Completed: 02/02/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040127.3TWP/SONDE/C2 - Broken temperature sensorstwpsondewnpnC2.b1
D040208.2TWP/SONDE/C2 - Questionable rH datatwpsondewnpnC2.b1
D040219.4TWP/SONDE/C2 - Bad RH sensortwpsondewnpnC2.b1
D040425.1TWP/SONDE/C2 - Bad RH values alofttwpsondewnpnC2.b1
D040711.2TWP/SONDE/C2 - RH sensor failure near surfacetwpsondewnpnC2.b1
D040815.1TWP/SONDE/C2 - Operator used wrong calibration tapetwpsondewnpnC2.b1
D040921.1TWP/SONDE/C2 - RH sensor failure below 9kmtwpsondewnpnC2.b1
D040921.2TWP/SONDE/C2 - Bad RH values alofttwpsondewnpnC2.b1


DQRID : D040127.3
Start DateStart TimeEnd DateEnd Time
10/13/2003004010/13/20030203
11/08/2003233511/09/20030215
11/18/2003120511/18/20031340
11/19/2003115611/19/20031346
11/21/2003004411/21/20030113
12/20/2003122512/20/20031408
12/21/2003005612/21/20030126
12/21/2003115512/21/20031344
12/23/2003004212/23/20030212
12/23/2003113712/23/20031259
12/23/2003234212/24/20030132
01/08/2004113501/08/20041309
01/09/2004115701/09/20041342
01/09/2004135901/09/20041537
01/12/2004234201/13/20040214
01/16/2004140901/16/20041548
01/16/2004233701/17/20040109
01/18/2004113501/18/20041256
01/19/2004022301/19/20040346
01/19/2004232901/20/20040157
01/21/2004125201/21/20041400
01/22/2004005201/22/20040227
01/23/2004113701/23/20041319
01/26/2004120201/26/20040146
02/17/2004140602/17/20041536
02/26/2004122102/26/20041350
03/09/2004114503/09/20041315
03/14/2004113103/14/20041300
03/22/2004113403/22/20041300
03/29/2004233203/30/20040047
03/30/2004233403/31/20040059
04/11/2004234804/12/20040120
05/01/2004233505/02/20040110
05/02/2004233605/03/20040109
05/13/2004233405/14/20040112
05/14/2004140605/14/20041411
06/07/2004022406/07/20040351
06/25/2004114606/25/20041328
07/02/2004005907/02/20040217
07/20/2004022007/20/20040358
07/24/2004123507/24/20041355
08/22/2004114408/22/20041207
09/08/2004142509/08/20041605
09/08/2004233809/08/20042345
10/18/2004234610/19/20040128
11/29/2004232111/30/20040105
12/08/2004114312/08/20041306
12/30/2004113012/30/20041239
Subject:
TWP/SONDE/C2 - Broken temperature sensors
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensors on these radiosondes broke after launch.  All
temperature-related data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Dry-Bulb Temperature(tdry)
  • Surface dew point temperature(dp)

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DQRID : D040208.2
Start DateStart TimeEnd DateEnd Time
02/04/2004114702/04/20041337
Subject:
TWP/SONDE/C2  - Questionable rH data
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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DQRID : D040219.4
Start DateStart TimeEnd DateEnd Time
02/18/2004003502/18/20040205
Subject:
TWP/SONDE/C2  - Bad RH sensor
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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DQRID : D040425.1
Start DateStart TimeEnd DateEnd Time
04/21/2004123204/21/20041248
Subject:
TWP/SONDE/C2 - Bad RH values aloft
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit on this sonde failed about 24 minutes into 
the flight.  The RH values look reasonable, though somewhat noisy, from the surface to 
approximately 6.9 km (439 hPa) at which point they begin to oscillate between 0 and 100 %.  
This behavior stops when the sonde reaches approximately 11.5km (232 hPa) when the air 
temperature drops below -40 degC.  The oscillation stops at that point, though the RH 
remains higher than might be expected even under supersaturated conditions.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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DQRID : D040711.2
Start DateStart TimeEnd DateEnd Time
07/10/2004123807/10/20041315
Subject:
TWP/SONDE/C2  - RH sensor failure near surface
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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DQRID : D040815.1
Start DateStart TimeEnd DateEnd Time
08/12/2004004408/12/20040233
Subject:
TWP/SONDE/C2 - Operator used wrong calibration tape
DataStreams:twpsondewnpnC2.b1
Description:
It appears as though the opperator used the wrong calibration tape for this sounding.  The 
primary symptom is a jump in temperature from a surface value of 30.1 degC to the first 
value aloft of 61.0 degC.  Secondly, the recorded serial number for this sounding is 
Z1430179 which is the same serial number recorded for the previous sounding.

This problem points to three failures of procedure (I have notified TWP site ops by 
e-mail).  The first failure is using the wrong tape. The second failure is not checking the 
radiosonde values before launch which relates to the third failure of not entering the 
radiosonde values as the surface values of the sounding.
Measurements:twpsondewnpnC2.b1:
  • Dry-Bulb Temperature(tdry)
  • Ascent Rate(asc)
  • east longitude for all the input platforms.(lon)
  • north latitude for all the input platforms.(lat)
  • Wind Status(wstat)
  • surface wind speed(wspd)
  • model meridional wind velocity(v_wind)
  • pressure at constant pressure surface(pres)
  • Time offset of tweaks from base_time(time_offset)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
  • Time offset from base_time(base_time)
  • model zonal wind velocity(u_wind)
  • Wind Direction(deg)
  • altitude above sea levelaltunits(alt)

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DQRID : D040921.1
Start DateStart TimeEnd DateEnd Time
09/16/2004113509/16/20041210
Subject:
TWP/SONDE/C2  - RH sensor failure below 9km
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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DQRID : D040921.2
Start DateStart TimeEnd DateEnd Time
09/17/2004114509/17/20041216
09/18/2004005809/18/20040133
09/19/2004140809/19/20041447
Subject:
TWP/SONDE/C2 - Bad RH values aloft
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuit on these sondes failed after launch but 
resume proper operation when the ambient temperature dropped below ~40 degC.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)

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END OF DATA