Data Quality Reports for Session: 144800 User: mlfischer Completed: 09/12/2012

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030722.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030807.1SGP/SONDE/C1 - A few bad temperature values at the beginning of the soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D031112.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1


DQRID : D030722.1
Start DateStart TimeEnd DateEnd Time
07/19/2003173007/19/20031930
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.a1, 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:
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)
sgpsondewnpnC1.a1:
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

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DQRID : D030807.1
Start DateStart TimeEnd DateEnd Time
08/02/2003172508/02/20031726
Subject:
SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
I've never seen this before.  The temperature reported by the radiosonde dropped over 30 
degC just after launch (usually a symptom of a broken temperature sensor), but then 
recovered after 14 seconds of bad readings.  The temperatures from 2 seconds through 14 seconds 
after launch are incorrect, the remainder of the sounding looks fine.  I have sent the 
data files to Vaisala for their consideration.
Measurements:sgpsondewnpnC1.b1:
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
sgpsondewnpnC1.a1:
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)

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DQRID : D031112.1
Start DateStart TimeEnd DateEnd Time
11/01/2003113311/01/20031315
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:
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

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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:
  • alt
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)

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