DQRID : D060630.27
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/23/2003152002/15/20061515Does not affect quality
SGP/SIRS/E21 - Reprocessed: Longwave Calibration error
Modified pyrgeometer calibration procedures were implemented beginning in July 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 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.
Retrieve the reprocessed data for use in your analysis.
  • up_long_hemisp
  • up_long_netir
  • down_long_netir
  • down_long_hemisp_shaded

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