DQRID : D030807.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/02/2003172508/02/20031726Incorrect
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Subject:
SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding
DataStreams:sgpsondewnpnC1.b1, sgpsondewnpnC1.a1
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.
Suggestions: 
Only the first bad temperature reading will trigger a standard mentor QC flag.  I 

suggest interpolating the temperature values from 2 sec though 14 sec using the surface 
value and the value at 16 sec as endpoints.
Measurements:sgpsondewnpnC1.b1:
  • tdry
  • dp
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sgpsondewnpnC1.a1:
  • tdry
  • dp
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