Data Quality Reports for Session: 111908 User: juanmicen Completed: 05/11/2008


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060630.44PYE/GNDRAD/M1 - Reprocessed: Longwave calibration errorpyegndrad60sM1.b1


DQRID : D060630.44
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/14/20050000
Subject:
PYE/GNDRAD/M1 - Reprocessed: Longwave calibration error
DataStreams:pyegndrad60sM1.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 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 February 2007.
Measurements:pyegndrad60sM1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)


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