DQRID : D040530.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/28/2003233005/29/20030010Suspect
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Subject:
TWP/SONDE/C1 - Bad RH sensor
DataStreams:twpsondewnpnC1.b1, twpsondewnpnC1.a1
Description:
It appears that the RH sensor heating circuit failed during this portion of the sounding 
(approximately between the surface and 11km).  The RH oscillates rapidly between low (~0 
%RH) and high (~80 %RH) and the oscillation seems to stop when the temperature is below 
~40 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.  The RH also 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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