DQRID : D991008.1
Start DateStart TimeEnd DateEnd Time
09/27/1999144510/14/19992230
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Subject:
SGP/THWAPS - RH values low by factor of 1.1
DataStreams:DsgpthwapsC1.b1, sgpthwapsC1.b1, DsgpthwapsC1.a1, sgpthwapsC1.00, sgpthwapsC1.a1
Description:
Because of instrument mentor stupidity, all C1 THWAPS RH data collected
from the begin date of this DQR are low by a factor of 1.1.  This error
also will affect the vapor pressure data.  The problem is that the CSI
data logger is expecting the data to be scaled 0-100%RH on the range 0-1V,
but it is now being scaled 0-110%RH on the range 0-1V.
Suggestions: 
The problem can be fixed by reprogramming the CSI data
logger.I will be sending instructions for doing so down to Site Ops soon.
The same problem affects the B1 THWAPS.  I will be filing
a separate DQR for that.  Data users can obtaine the correct
RH by multiplying the values in the file by 1.1.
Measurements:DsgpthwapsC1.b1:
  • (Development data stream - documentation not supported)
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DsgpthwapsC1.a1:
  • (Development data stream - documentation not supported)
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sgpthwapsC1.b1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard deviation of vapor pressure(sd_vap_pres)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative Humidity (hybrid-b grid)(rh)
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sgpthwapsC1.a1:
  • Standard Deviation of Relative Humidity(sd_rh)
  • Standard deviation of vapor pressure(sd_vap_pres)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Relative Humidity (hybrid-b grid)(rh)
more
sgpthwapsC1.00:
  • (Raw data stream - documentation not supported)
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