Data Quality Reports for Session: 118807 User: vermeesch Completed: 04/09/2009

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
D020110.1SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020524.27SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RHsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020526.1SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020611.2SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etcsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.34SGP/SONDE/C1 - Incorrect Surface PressuresgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020626.35SGP/SONDE/C1 - Bad Temperature SensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020703.1SGP/SONDE/C1 - Temperature sensor failuresgpqmemwrcolC1.c1, sgpsondewnpnC1.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 : D020110.1
Start DateStart TimeEnd DateEnd Time
01/08/2002052801/08/20020714
Subject:
SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528
DataStreams:sgpsondewnpnC1.a1, 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.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 : D020524.27
Start DateStart TimeEnd DateEnd Time
05/22/2002113005/22/20021347
Subject:
SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH
DataStreams:sgpsondewnpnC1.a1, 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.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020526.1
Start DateStart TimeEnd DateEnd Time
05/23/2002112905/23/20021322
Subject:
SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129
DataStreams:sgpsondewnpnC1.a1, 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.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020611.2
Start DateStart TimeEnd DateEnd Time
06/09/2002022906/09/20020236
Subject:
SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc
DataStreams:sgpsondewnpnC1.a1, 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.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020626.34
Start DateStart TimeEnd DateEnd Time
06/17/2002112806/17/20021313
Subject:
SGP/SONDE/C1 - Incorrect Surface Pressure
DataStreams:sgpsondewnpnC1.a1, 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.a1:
  • Dummy altitude for Zeb(alt)
  • Ascent Rate(asc)
sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020626.35
Start DateStart TimeEnd DateEnd Time
06/19/2002232906/20/20020036
Subject:
SGP/SONDE/C1 - Bad Temperature Sensor
DataStreams:sgpsondewnpnC1.a1, 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.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)

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DQRID : D020703.1
Start DateStart TimeEnd DateEnd Time
06/27/2002172806/27/20021908
Subject:
SGP/SONDE/C1 - Temperature sensor failure
DataStreams:sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
Temperature sensor broke at launch.  All temperature-related variables
are incorrect.
Measurements: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)
sgpqmemwrcolC1.c1:
  • Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
  • Integrated vapor column from sonde using a direct calculation (external from the
    IPM)(integ_vap_sonde_direct)

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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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