DQRID : D090520.1
Start DateStart TimeEnd DateEnd Time
05/15/2009113010/14/20091256
more
Subject:
SGP/SIRS/E1 - Tracker failure
DataStreams:sgpsirs20sE1.a0, sgpsirsE1.b1
Description:
The solar tracker stopped functioning sometime before sunrise on 05/15.  Numerous attempts 
were made to repair/realign the tracker, all futile. 

All daytime values of short_direct_normal and down_short_diffuse_hemisp were incorrect or 
suspect after ~11:30 GMT on May 15.

This facility is being decommissioned and maintenance efforts ceased 10/1/2009.  
Instrument was removed from service 10/14/2009.

Data are not recoverable.
Suggestions: 
Measurements:sgpsirsE1.b1:
  • Shortwave direct normal irradiance, pyrheliometer, minima(short_direct_normal_min)
  • 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)
  • Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyrgeometer, Minima(down_short_diffuse_hemisp_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
more
sgpsirs20sE1.a0:
  • Instantaneous uncorrected downwelling shortwave diffuse, shaded pyranometer
    thermopile voltage(inst_diffuse)
  • Instantaneous direct normal shortwave irradiance, pyrheliometer thermopile
    voltage(inst_direct_normal)
more

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