DQRID : D030427.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/08/2003234704/09/20030003Suspect
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Subject:
TWP/SONDE/C1 - Questionable RH
DataStreams:twpsondewnpnC1.b1, twpsondewnpnC1.a1
Description:
It appears that the RH sensor heating circuit failed during this portion of the sounding 
(approximately between 5km and 10km).  The RH oscillates rapidly between low (~5 %RH) and 
not so low (~50 %RH) and the oscillation seems to stop when the temperature is below ~35 
degC.  According to Vaisala these are symptoms of failure in the ASIC (application 
specific integrated circuit) that controls the heating.
Suggestions: 
Some data may be recovered by analysis of the raw data.  I have requested this from 

the archive to explore that possibility.  Otherwise, the RH might be recovered (though at 
some degrading of the vertical resolution) by choosing only the highest RH values within 
each two-minute period of the sounding in this area.
Measurements:twpsondewnpnC1.b1:
  • dp
  • rh
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twpsondewnpnC1.a1:
  • dp
  • rh
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