DQRID : D050813.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000012/07/19991800Does not affect quality
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Subject:
SGP/THWAPS/B1 - Minor bias in humidity
DataStreams:sgpthwapsB1.b1, sgpthwapsB1.a1
Description:
The THWAPS humidity sensor output was scaled so that the instrument output
voltage range (0-1VDC) represented 0-100 %RH. Comparisons with the
co-located chilled mirror sensor at the CF suggested that the THWAPS RH
sensor was reading artifically low at high humidities because of this 100
%RH maximum. 
   
The scaling of the system was changed so that 0-1 VDC now represents 0-110
%RH. This resulted in a slight loss of precision in the measurements, but
since the RH measurement is only accurate to 2-3 %RH at best, this isn't a
significant problem.
Suggestions: 
Measurements:sgpthwapsB1.a1:
  • rh
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sgpthwapsB1.b1:
  • rh
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