Data Quality Reports for Session: 107110 User: tjwagner Completed: 08/16/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020313.1SGP/THWAPS/C1 - THWAPS C1 miscalibratedsgpthwapsC1.a1, sgpthwapsC1.b1
D050812.12SGP/THWAPS/C1 - Minor bias in saturation vapor pressuresgpthwapsC1.b1
D050813.2SGP/THWAPS/B1 - Minor bias in saturation vapor pressuresgpthwapsB1.b1


DQRID : D020313.1
Start DateStart TimeEnd DateEnd Time
03/09/2002034004/23/20021418
Subject:
SGP/THWAPS/C1 - THWAPS C1 miscalibrated
DataStreams:sgpthwapsC1.a1, sgpthwapsC1.b1
Description:
Power outages apparently led to the THWAPS HMP233 temperature and RH sensor
being replaced at C1.  The power went out at 0340 on 3/9 was restored at
0635 and went out again at 2025.

The new HMP233 appears to be incorrectly calibrated and all temperature
data since its installation are wrong.  If I am correct about the nature
of the calibration problem, the true average temperature can be recovered
from that recorded by a linear conversion, but I don't think its worth the
trouble.
Measurements:sgpthwapsC1.a1:
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • Environmental Temperature (hybrid-b grid)(temp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpthwapsC1.b1:
  • Environmental Temperature (hybrid-b grid)(temp)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Standard Deviation of Air Temperature(sd_temp)
  • Standard deviation of Relative Humidity(sd_rh)
  • Vapor Pressure (kiloPascals)(vap_pres)

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DQRID : D050812.12
Start DateStart TimeEnd DateEnd Time
09/21/1999000008/10/20051445
Subject:
SGP/THWAPS/C1 - Minor bias in saturation vapor pressure
DataStreams:sgpthwapsC1.b1
Description:
The saturation vapor correction when temps are below 0C contained an error
in the multiplier.  The incorrect multiplier only equates to an error of
0.01 kPa which is less than the stated uncertainty of the measurement (+/-
0.035 kPa).
Measurements:sgpthwapsC1.b1:
  • Vapor Pressure (kiloPascals)(vap_pres)

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DQRID : D050813.2
Start DateStart TimeEnd DateEnd Time
09/21/1999000008/01/20052034
Subject:
SGP/THWAPS/B1 - Minor bias in saturation vapor pressure
DataStreams:sgpthwapsB1.b1
Description:
The saturation vapor correction when temps are below 0C contained an error
in the multiplier.  The incorrect multiplier only equates to an error of
0.01 kPa which is less than the stated uncertainty of the measurement (+/-
0.035 kPa).
Measurements:sgpthwapsB1.b1:
  • Vapor Pressure (kiloPascals)(vap_pres)

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