Data Quality Reports for Session: 117888 User: vghate Completed: 03/02/2009


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060630.7SGP/BRS/C1 - Reprocessed: Longwave Calibration errorsgpbrsC1.b1


DQRID : D060630.7
Start DateStart TimeEnd DateEnd Time
12/11/2003193502/16/20061903
Subject:
SGP/BRS/C1 - Reprocessed: Longwave Calibration error
DataStreams:sgpbrsC1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in June 2004. 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 have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in November 2006.
Measurements:sgpbrsC1.b1:
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)


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