DQRID : D110628.2
Start DateStart TimeEnd DateEnd Time
06/12/2011000006/24/20111740
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Subject:
SGP/SIRS/C1 - NIP failure
DataStreams:sgpsirsC1.b1, sgpsirs20sC1.a0
Description:
The short_direct_normal (NIP instrument) cable failed during this time period.	Data are 
not recoverable.

Users can derive an estimate of direct normal values using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)
Suggestions: 
Measurements:sgpsirsC1.b1:
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave direct normal irradiance, pyrheliometer, minima(short_direct_normal_min)
  • Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
more
sgpsirs20sC1.a0:
  • Instantaneous direct normal shortwave irradiance, pyrheliometer thermopile
    voltage(inst_direct_normal)
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