DQRID : D100811.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/05/2010170008/10/20101628Incorrect
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Subject:
SGP/SIRS/E7 - NIP connector failure
DataStreams:sgpsirsE7.b1, sgpsirs20sE7.a0
Description:
After instrument replacement 8/5/2010 approx 1700GMT the short_direct_normal values became 
intermittent due to a failed NIP connector. Ops repaired the connector on 8/10 
rectifying the problem.

The short_direct_normal (NIP instrument) data are not recoverable during this period. 
Although there will be greater uncertainty the short_direct_normal can be reconstructed from 
the global and diffuse measurements for each minute of 
data using the following relationship:
down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse.
Suggestions: 
Measurements:sgpsirs20sE7.a0:
  • inst_direct_normal
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sgpsirsE7.b1:
  • short_direct_normal
  • short_direct_normal_min
  • short_direct_normal_std
  • short_direct_normal_max
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