DQRID : D050205.1
Start DateStart TimeEnd DateEnd Time
12/30/2004210002/08/20052055
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Subject:
SGP/SIRS/E1 - broken cable on DSDH (aka DD) measurment instrument - Eppley 8-48.
DataStreams:sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1
Description:
Occasionally, the downwelling shortwave diffuse hemispheric (DSDH) readings spike to 
unreasonably low levels, causing derived downwelling shortwave hemispheric (DSH) readings to 
spike well below the actual DSH readings.  Technicians repaired the DSDH instument (an 
Eppley 8-48) cable on 02/08/2005 2055GMT.  There have been no dropouts since that time.
Suggestions: 
Disregard minimum outliers for DSDH data.  No consistent minimum treshold is available.
Measurements:sgpsirsE1.b1:
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling shortwave diffuse hemispheric irradiance, pyranometer, maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyranometer, Standard
    Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyrgeometer, Minima(down_short_diffuse_hemisp_min)
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sgpsirs20sE1.a0:
  • Instantaneous uncorrected downwelling shortwave diffuse, shaded pyranometer
    thermopile voltage(inst_diffuse)
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sgpsirsE1.00:
  • (Raw data stream - documentation not supported)
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