Data Quality Reports for Session: 115425 User: julia1flah Completed: 11/03/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D031008.1TWP/SONDE/C2 - Strange problem with data -twpsondeC2.00, twpsondewnpnC2.00, twpsondewnpnC2.b1
D031231.1TWP/SONDE/C2 - RH sensor badtwpsondewnpnC2.b1
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
D050913.3TWP/SONDE/C2 - Bad RH sensortwpsondewnpnC2.b1
D051122.2TWP/SONDE/C2 - Broken temperature sensortwpsondewnpnC2.b1
D051219.2TWP/SONDE/C2 - Broken temperature sensortwpsondewnpnC2.b1
D060308.1TWP/SONDE/C2 - Broken temperature sensortwpsondewnpnC2.b1
D060403.2TWP/SONDE/C2 - Broken temperature sensortwpsondewnpnC2.b1
D060418.1TWP/SONDE/C2 - Bad RH in lower 8kmtwpsondewnpnC2.b1
D070308.3TWP/SONDE/C2 - Surface Temperature IncorrecttwpsondewnpnC2.b1
D070308.4TWP/SONDE/C2 - Surface RH value incorrecttwpsondewnpnC2.b1
D070313.2TWP/SONDE/C2 - Surface RH value incorrecttwpsondewnpnC2.b1
D070329.2TWP/SONDE/C2 - Surface RH Value incorrecttwpsondewnpnC2.b1
D070404.1TWP/SONDE/C2 - Surface RH too hightwpsondewnpnC2.b1
D070428.1TWP/SONDE/C2 - Broken temperature sensor at launchtwpsondewnpnC2.b1
D070501.2TWP/SONDE/C2 - Broken temperature sensor at launchtwpsondewnpnC2.b1


DQRID : D031008.1
Start DateStart TimeEnd DateEnd Time
10/02/2003023210/02/20030300
Subject:
TWP/SONDE/C2 - Strange problem with data -
DataStreams:twpsondeC2.00, twpsondewnpnC2.00, twpsondewnpnC2.b1
Description:
This is very strange.  The data has what appears to be a pressure jump at launch (from 
1007.2 to 956.5 hPa) but the sounding temperature and RH data clearly look to be 
interpolated between the surface and tropopause.  By examining the absolutely raw data, I found that 
the system assigned an elapsed time of 408 seconds (since system start up) to the launch 
point, but there is no raw data between 410 and 532 seconds.  The raw pressure value at 
410 seconds is 1007.6 hPa and that at 532 seconds is 40.9 hPa!  Unless this sounding was 
done by using a rocket-powered balloon (maybe even then), it would be impossible for the 
sonde to get to 40.9 hPa in 2 minutes.  Because the apparent gap is only two minutes, the 
system was able to interpolate but is not sophisticated enough to understand that the 
limits of the interpolation are unreasonable.

I can't imagine what went wrong - I've not seen anything like this before.
Measurements:twpsondeC2.00:
  • null(Raw data stream - documentation not supported)
twpsondewnpnC2.b1:
  • Dry bulb temperature(tdry)
  • Ascent Rate(asc)
  • lon(lon)
  • lat(lat)
  • Wind Status(wstat)
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • Retrieved pressure profile(pres)
  • Time offset of tweaks from base_time(time_offset)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • U-component(u_wind)
  • Wind Direction(deg)
  • Dummy altitude for Zeb(alt)
twpsondewnpnC2.00:
  • null(Raw data stream - documentation not supported)

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DQRID : D031231.1
Start DateStart TimeEnd DateEnd Time
10/22/2003002510/22/20030155
10/22/2003234010/23/20030121
Subject:
TWP/SONDE/C2 - RH sensor bad
DataStreams:twpsondewnpnC2.b1
Description:
It appears that the RH sensor heating circuits failed during these
soundings.  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 inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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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 inside the instrument enclosure(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 inside the instrument enclosure(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 inside the instrument enclosure(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 inside the instrument enclosure(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 inside the instrument enclosure(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)
  • lon(lon)
  • lat(lat)
  • Wind Status(wstat)
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • Retrieved pressure profile(pres)
  • Time offset of tweaks from base_time(time_offset)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • U-component(u_wind)
  • Wind Direction(deg)
  • Dummy altitude for Zeb(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 inside the instrument enclosure(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 inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D050913.3
Start DateStart TimeEnd DateEnd Time
07/03/2005235007/04/20050024
07/10/2005234007/11/20050021
07/19/2005233207/20/20050016
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 -50 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 inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D051122.2
Start DateStart TimeEnd DateEnd Time
11/19/2005233411/20/20050153
11/21/2005233211/22/20050140
Subject:
TWP/SONDE/C2 - Broken temperature sensor
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)

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DQRID : D051219.2
Start DateStart TimeEnd DateEnd Time
12/07/2005115312/07/20051323
Subject:
TWP/SONDE/C2  - Broken temperature sensor
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)

Back To Table of Contents

DQRID : D060308.1
Start DateStart TimeEnd DateEnd Time
01/15/2006114401/15/20061328
01/19/2006131801/19/20061320
01/22/2006114901/22/20061315
02/14/2006005502/14/20060207
02/21/2006023202/21/20060359
Subject:
TWP/SONDE/C2  - Broken temperature sensor
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)

Back To Table of Contents

DQRID : D060403.2
Start DateStart TimeEnd DateEnd Time
03/27/2006004303/27/20060208
Subject:
TWP/SONDE/C2  - Broken temperature sensor
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)

Back To Table of Contents

DQRID : D060418.1
Start DateStart TimeEnd DateEnd Time
04/10/2006024704/10/20060314
Subject:
TWP/SONDE/C2  - Bad RH in lower 8km
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 inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

Back To Table of Contents

DQRID : D070308.3
Start DateStart TimeEnd DateEnd Time
01/02/2007112801/02/20071129
Subject:
TWP/SONDE/C2 - Surface Temperature Incorrect
DataStreams:twpsondewnpnC2.b1
Description:
The first two temperature values in the datafile are incorrect.  It appears that the 
observer mis-typed the surface temperature as -27 instead of +27.  The next value was 8 which 
is also incorrect and was caused by the system interpolating from the incorrect surface 
value and what the sonde temperature sensor was reading.
Measurements:twpsondewnpnC2.b1:
  • Dry bulb temperature(tdry)

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DQRID : D070308.4
Start DateStart TimeEnd DateEnd Time
01/23/2007113001/23/20071131
Subject:
TWP/SONDE/C2 - Surface RH value incorrect
DataStreams:twpsondewnpnC2.b1
Description:
The surface RH value was incorrect.  It appears the observer mis-typed 70 instead of 80.  
This error also caused the dew point temperature to be incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D070313.2
Start DateStart TimeEnd DateEnd Time
03/08/2007235003/08/20072353
Subject:
TWP/SONDE/C2 - Surface RH value incorrect
DataStreams:twpsondewnpnC2.b1
Description:
The surface RH was reproted as 78%.  The value should have been in the low 50's.  It 
appears the observer did not allow the sonde to equilibrate to ambient conditions before 
taking the reading.  This error also caused an incorrect dew point.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D070329.2
Start DateStart TimeEnd DateEnd Time
03/28/2007231903/28/20072320
Subject:
TWP/SONDE/C2 - Surface RH Value incorrect
DataStreams:twpsondewnpnC2.b1
Description:
The surface value entered by the observers for RH (96%) is incorrect.  At the ascent time 
listed in the .ptu file the readings by the Sonde were around 65%.  This low RH value is 
supported by the nearby SMET tower RH reading of 71.8%.  This also caused the surface dew 
point to be incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D070404.1
Start DateStart TimeEnd DateEnd Time
04/03/2007233004/03/20072331
Subject:
TWP/SONDE/C2 - Surface RH too high
DataStreams:twpsondewnpnC2.b1
Description:
The surface Rh was entered as 94%.  The ascent time has 72% and this value is supported by 
RH values from the nearby SMET system.  This error also will affect the dew point.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)

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DQRID : D070428.1
Start DateStart TimeEnd DateEnd Time
04/27/2007114004/27/20071420
Subject:
TWP/SONDE/C2 - Broken temperature sensor at launch
DataStreams:twpsondewnpnC2.b1
Description:
Temperature sensor broken at launch.  All thermodynamic values are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
  • Wind Direction(deg)

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DQRID : D070501.2
Start DateStart TimeEnd DateEnd Time
04/30/2007235905/01/20070200
Subject:
TWP/SONDE/C2 - Broken temperature sensor at launch
DataStreams:twpsondewnpnC2.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All the temperature-related 
data are incorrect.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)

Back To Table of Contents


END OF DATA