Data Quality Reports for Session: 112598 User: anfrench Completed: 06/20/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D011207.3SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 soundingsgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D011231.1SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D011231.2SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1


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

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DQRID : D011231.1
Start DateStart TimeEnd DateEnd Time
12/22/2001052712/22/20010659
Subject:
SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature data in this sounding look bad after the first value.  The
temperature series is 11.4, 2.6, -14.3, -32.4 in the first 6 seconds of
flight.  I don't know why this occurred, but it obviously is incorrect.
The pressure and RH data look reasonable.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)

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DQRID : D011231.2
Start DateStart TimeEnd DateEnd Time
12/28/2001232612/29/20010045
Subject:
SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature data in this sounding are bad from approximately 16 seconds
into the flight.  The temperature series is 9.9, 10.8, 11.3, 1.5, 11.6, 11.6,
11.6, -32.2 and remains below -30 degC.  I don't know why this occurred, but
it clearly is incorrect.  The pressure data looks OK as does the RH, though
the RH data are missing (probably sensor failure) above roughly 3.5 km.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)

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DQRID : 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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