DQRID : D980506.1
Start DateStart TimeEnd DateEnd Time
04/29/1998143104/29/19981431
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Subject:
Incorrect surface values
DataStreams:sgpsondewrpnC1.a1
Description:
The surface pressure, temperature, and relative humidity are incorrect for
this soundings.  The values in the sounding netCDF file (975.6, 3.2, 86)
are different from the surface observations in the site ops log (978.9,
9.1, and 83) and from the values in the raw radiosonde data file at
the moment just before ascent (978.7, 9.5, 83).  The reason for the
differences are unknown, but insofar as the surface values are manually
entered by the operator into both the log (where they are correct) and
into the sounding file (where they are incorrect) an operator
miscue is a possibility.

The major effect of this problem will be incorrect absolute altitude.
Suggestions: 
Measurements:sgpsondewrpnC1.a1:
  • V wind component(v_wind)
  • Wind status(wstat)
  • North Latitude(lat)
  • base time in epoch(base_time)
  • -180.0 - +180.0(alt)
  • Dewpoint Temperature(dp)
  • Dry Bulb Temperature(tdry)
  • lon(lon)
  • Wind Direction(deg)
  • Ascent rate(asc)
  • Relative Humidity (hybrid-b grid)(rh)
  • Wind Speed(wspd)
  • Easterly Wind Component(u_wind)
  • Time offset from base_time(time_offset)
  • Retrieved pressure profile(pres)
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