DQRID : D120420.6
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/18/2009175107/31/20091645Incorrect
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Subject:
SGP/QCRAD/C1 - SW direct normal data drop out
DataStreams:sgpqcrad1longC1.c2, sgpqcrad1longC1.s2, sgpqcrad1longC1.s1, sgpqcrad1longC1.c1
Description:
NIP cable had failed during this time period.  Short_direct_normal data are not 
recoverable during this time period. However, it can be reconstructed using the following formula 
for each one minute data:
   short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(zenith angle)

Documented in instrument DQR D090623.1
Suggestions: 
Use direct normal measurements from E13 or calculate from diffuse and global.
Measurements:sgpqcrad1longC1.c1:
  • short_direct_normal
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sgpqcrad1longC1.s1:
  • short_direct_normal
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sgpqcrad1longC1.c2:
  • short_direct_normal
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sgpqcrad1longC1.s2:
  • short_direct_normal
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