DQRID : D110513.9
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/02/2004000009/02/20042359Suspect
more
Subject:
NSA/QCRAD/C1 - Incorrect value of solar zenith angle
DataStreams:nsaqcrad1longC1.s1, nsaqcrad1longC1.c1
Description:
A missing lat/lon value in the SKYRAD input file on 8/26/04 led to incorrect calculation 
of solar zenith angle in the 9/2/04 QCRAD file (QCRAD reads in a week of data at a time 
and uses lat/lon from the first file).  

The solar zenith angles in this file are all incorrect.  The radiation data are likely 
fine, but many of the tests on the shortwave fluxes use solar zenith angle and therefore the 
qc and aqc fields may be incorrect and may incorrectly flag the shortwave flux data.  

The longwave data should be unaffected.
Suggestions: 
Measurements:nsaqcrad1longC1.s1:
  • lat
  • source_BestEstimate_down_short_hemisp
  • up_short_hemisp
  • BestEstimate_down_short_hemisp
  • short_direct_normal
  • down_short_diffuse_hemisp
  • lon
  • zenith
more
nsaqcrad1longC1.c1:
  • aqc_SWupTest
  • lat
  • aqc_DifSW2GSW
  • BestEstimate_down_short_hemisp
  • aqc_GSW2SumSW
  • aqc_down_short_hemisp
  • aqc_short_direct_normal
  • source_BestEstimate_down_short_hemisp
  • zenith
  • short_direct_normal
  • aqc_down_short_diffuse_hemisp
  • lon
  • up_short_hemisp
  • down_short_diffuse_hemisp
  • down_short_hemisp
more

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