DQRID : D071025.1
Start DateStart TimeEnd DateEnd Time
10/03/2007035910/25/20072148
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Subject:
NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient
DataStreams:nsaskyrad60sC1.b1, nsaskyrad20sC1.a0
Description:
Installed Skyrad PSP (downwelling shortwave hemispheric irradiance) had calibration 
coefficient Rs applied when it should have used Rsc.  ARM is using IR corrected Rsc and CFc 
coefficients for PSPs deployed at all facilities.  

PSP #32026 should use RSc@45=8.7578 ?V/W/m? and not Rs@45=8.6335.

Reprocessed to correct downwelling shortwave hemispheric irradiance (DS) by:
DS(new) = (DS(old) / 115.83 ) * 114.18

Reprocessing completed March 2008.
Suggestions: 
Retrieve reprocessed data for your analysis
Measurements:nsaskyrad20sC1.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Pyranometer Thermopile Voltage(inst_global)
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nsaskyrad60sC1.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Minima(down_short_hemisp_min)
  • Downwelling shortwave hemispheric irradiance, pyranometer, maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
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