DQRID : D970409.3
Start DateStart TimeEnd DateEnd Time
04/04/1997173304/04/19971733
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Subject:
Reprocess: Jump in pressure value
DataStreams:sgpsondewrpnB6.a1
Description:
The first pressure value reported by the radiosonde (t = 2 sec) is 879.2.  The surface 
pressure value was 962.1 hPa.  Either the pressure sensor was jarred during launch or the 
system misidentified the actual launch start time.  Further clarification requires analysis 
of the raw data which will take some time.  The altitude values for this sounding will 
be incorrect.  The ascent rate values during the first 30 seconds also will be wrong.  
Because the system will reject samples with out of bound ascent rates (i.e., during the 
first 30 seconds), the temperature and relative humidity values also will be incorrect 
(result of interpolation).  Relative height values after 30 seconds should be okay.
Suggestions: 
Do not use data
Measurements:sgpsondewrpnB6.a1:
  • -180.0 - +180.0(alt)
  • Dewpoint Temperature(dp)
  • V wind component(v_wind)
  • Wind Direction(deg)
  • Wind Speed(wspd)
  • Retrieved pressure profile(pres)
  • Relative Humidity (hybrid-b grid)(rh)
  • Ascent rate(asc)
  • Easterly Wind Component(u_wind)
  • Wind status(wstat)
  • Dry Bulb Temperature(tdry)
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