Data Quality Reports for Session: 105091 User: lkberg Completed: 04/09/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030916.6SGP/BRS/C1 - low downwelling shortwave readingssgpbrsC1.00, sgpbrsC1.a2, sgpbrs20sC1.a0, sgpbrs60sC1.a1


DQRID : D030916.6
Start DateStart TimeEnd DateEnd Time
03/05/2001000004/17/20032359
Subject:
SGP/BRS/C1 - low downwelling shortwave readings
DataStreams:sgpbrsC1.00, sgpbrsC1.a2, sgpbrs20sC1.a0, sgpbrs60sC1.a1
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 Pyrgeometer, Minima(down_short_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
sgpbrsC1.a2:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)

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