Data Quality Reports for Session: 106969 User: normbw!013 Completed: 08/09/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060630.8SGP/SIRS/C1 - Reprocessed: Longwave Calibration errorsgpsirsC1.b1
D061121.2SGP/SIRS/C1 - Upwelling SW cable problemsgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0
D070306.1SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficientssgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0


DQRID : D060630.8
Start DateStart TimeEnd DateEnd Time
12/11/2003195002/16/20061901
Subject:
SGP/SIRS/C1 - Reprocessed: Longwave Calibration error
DataStreams:sgpsirsC1.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 October 2006.
Measurements:sgpsirsC1.b1:
  • 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)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

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DQRID : D061121.2
Start DateStart TimeEnd DateEnd Time
11/13/2006090001/23/20071930
Subject:
SGP/SIRS/C1 - Upwelling SW cable problem
DataStreams:sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0
Description:
Starting 11/13/2006, the C1 SIRS Upwelling Shortwave (up_short_hemisp) started to show 
large differences in comparison to co-located E13 SIRS and C1 IRT25m.  After much 
troubleshooting and gnashing of teeth it was discovered that rodents had chewed through the 
instrument cables at the bottom of the tilt tower. Cables were replaced 01/23/2007 1930GMT.
Measurements:sgpsirsC1.b1:
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
sgpsirsC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirs20sC1.a0:
  • Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile
    Voltage(inst_up_short_hemisp)

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DQRID : D070306.1
Start DateStart TimeEnd DateEnd Time
07/03/2006150903/06/20071610
Subject:
SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients
DataStreams:sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0
Description:
Incorrection calibration coefficients were used in the C1/SIRS datalogger program. The 
PSP-US (upwelling shortwave global hemispheric), 30943F3 should be 126.93 not 129.93 
[W/m2/mV].
Measurements:sgpsirsC1.b1:
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
sgpsirsC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirs20sC1.a0:
  • Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile
    Voltage(inst_up_short_hemisp)

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