Data Quality Reports for Session: 128469 User: lijun1ljr Completed: 06/16/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060630.6SGP/IRT/C1 - Reprocess: Longwave Calibration errorsgpirt25mC1.b1
D080930.2SGP/IRT/C1 - Contamination of 25M lenssgpirt25mC1.b1


DQRID : D060630.6
Start DateStart TimeEnd DateEnd Time
01/15/2004205202/14/20062050
Subject:
SGP/IRT/C1 - Reprocess: Longwave Calibration error
DataStreams:sgpirt25mC1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:sgpirt25mC1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
  • Instantaneous Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(inst_up_long_hemisp)

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DQRID : D080930.2
Start DateStart TimeEnd DateEnd Time
05/25/2008000010/01/20081905
Subject:
SGP/IRT/C1 - Contamination of 25M lens
DataStreams:sgpirt25mC1.b1
Description:
The IRT exhibited a positive bias compared to PIR. The problem was corrected by cleaning 
the lens.
Measurements:sgpirt25mC1.b1:
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Instantaneous Surface Infra-red Temperature(inst_sfc_ir_temp)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

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