Data Quality Reports for Session: 102402 User: harris Completed: 11/01/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050205.4SGP/SIRS/E18 - Possible PSP dome contaminationsgpsirsE18.00, sgpsirsE18.b1, sgpsirs20sE18.a0
D060630.24SGP/SIRS/E18 - Reprocess: Longwave Calibration errorsgpsirsE18.b1


DQRID : D050205.4
Start DateStart TimeEnd DateEnd Time
02/03/2005120002/15/20052250
Subject:
SGP/SIRS/E18 - Possible PSP dome contamination
DataStreams:sgpsirsE18.00, sgpsirsE18.b1, sgpsirs20sE18.a0
Description:
Downwelling shortwave hemispheric (DSH) measurements did not agree with derived DSH 
readings during the morning hours up to 1500GMT each clear day.   PM cleaning on 2/16 2250 
revealed nothing other than dirty water spots.  A dirty or ice covered PSP dome may have been 
the cause, clearing itself before the PM crew arrived.
Measurements:sgpsirs20sE18.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
sgpsirsE18.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
sgpsirsE18.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D060630.24
Start DateStart TimeEnd DateEnd Time
07/22/2003220002/14/20062100
Subject:
SGP/SIRS/E18 - Reprocess: Longwave Calibration error
DataStreams:sgpsirsE18.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:sgpsirsE18.b1:
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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