DQRID : D970624.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/19/1997113006/19/19971130Suspect
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Subject:
Jump in pressure value B6
DataStreams:sgpsondewrpnB6.a1
Description:
The first pressure value reported by the radiosonde (t = 2 sec) is 968.0.  The surface 
pressure value was 974.5 hPa.  This difference is greater than the expected (normal) change 
and may mean that either the pressure sensor was jarred during launch or the system 
mis-identified the actual launch start time.  Further clarification requires  analysis of the 
raw data which will take some time.  The altitude values  for this sounding may 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 RH values also will be incorrect (a result of  interpolation). 
 Relative height values after 30 seconds should be okay.
Suggestions: 
Use data with caution
Measurements:sgpsondewrpnB6.a1:
  • alt
  • dp
  • v_wind
  • deg
  • wspd
  • pres
  • rh
  • asc
  • u_wind
  • wstat
  • tdry
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