Data Quality Reports for Session: 101727 User: normbw!013 Completed: 09/25/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050201.1SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry errorsgpsondewnpnC1.b1


DQRID : D050201.1
Start DateStart TimeEnd DateEnd Time
01/19/2005053101/19/20050706
Subject:
SGP/SONDE/C1 - Possibly bad pressure sensor or operator data entry error
DataStreams:sgpsondewnpnC1.b1
Description:
There is a discrepency between the surface pressure and temperature data entered by the 
operator and that recorded by the THWAPS.  Review of the raw data from the radiosonde shows 
that the pressure was periodically varying by as much as 12 hPa (~988 to 1000)in the 
time period before launch.  The operator entry of 998.2 is at the high end of this range - 
the concurrent THWAPS reading was about 988.4 at the low end.  The operator entered 
temperature 6.2 degC is considerably higher than the THWAPS value of 1.8.  The pre-flight log 
entry for this sounding is missing from the OMIS database.  If not for the extremely 
unstable pressure reading I would have assumed this was an operator error.  It will take some 
more research to figure out what is going on.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Time offset from base_time(base_time)
  • surface wind speed(wspd)
  • model zonal wind velocity(u_wind)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • Ascent Rate(asc)
  • pressure at constant pressure surface(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • east longitude for all the input platforms.(lon)
  • Dry-Bulb Temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • model meridional wind velocity(v_wind)
  • altitude above sea levelaltunits(alt)


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