Data Quality Reports for Session: 110377 User: bwalter99 Completed: 02/08/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030916.6SGP/BRS/C1 - low downwelling shortwave readingssgpbrs20sC1.a0, sgpbrs60sC1.a1, sgpbrsC1.00, sgpbrsC1.a2
D050322.1SGP/BRS/C1 - low downwelling shortwave readingssgpbrs20sC1.a0, sgpbrsC1.00, sgpbrsC1.b1
D061102.1SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurementsgpbrs20sC1.a0, sgpbrsC1.b1


DQRID : D030916.6
Start DateStart TimeEnd DateEnd Time
03/05/2001000004/17/20032359
Subject:
SGP/BRS/C1 - low downwelling shortwave readings
DataStreams:sgpbrs20sC1.a0, sgpbrs60sC1.a1, sgpbrsC1.00, sgpbrsC1.a2
Description:
Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are 
consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in 
clear-sky conditions. Corrective maintenance on 12/1/2004 corrected this offset.  It is not 
clear which CM action corrected the problem since the DS instrument cable was grounded to a 
new location and the DS ventilator fan was found in poor condition and was replaced.  
Either of these issues could have led to the problem observed in this instrument.
Measurements:sgpbrs20sC1.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
sgpbrsC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpbrs60sC1.a1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
sgpbrsC1.a2:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)

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DQRID : D050322.1
Start DateStart TimeEnd DateEnd Time
04/18/2003000012/17/20042030
Subject:
SGP/BRS/C1 - low downwelling shortwave readings
DataStreams:sgpbrs20sC1.a0, sgpbrsC1.00, sgpbrsC1.b1
Description:
Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are 
consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in 
clear-sky conditions. Corrective maintenance on 12/17/2004 corrected this offset.  It is not 
clear which CM action corrected the problem since the DS instrument cable was grounded to 
a new location and the DS ventilator fan was found in poor condition and was replaced.  
Either of these issues could have led to the problem observed in this instrument.
Measurements:sgpbrs20sC1.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
sgpbrsC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpbrsC1.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)

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DQRID : D061102.1
Start DateStart TimeEnd DateEnd Time
12/11/2003192006/14/20042359
Subject:
SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement
DataStreams:sgpbrs20sC1.a0, sgpbrsC1.b1
Description:
On 20031211 the Downwelling LW pyrgeometer was replaced but the calibrations were not 
updated.  Calibrations have been corrected in data beginning 20040615.
Measurements:sgpbrs20sC1.a0:
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
sgpbrsC1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)

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