DQRID : D050420.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/03/2000130008/15/20011350Suspect
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Subject:
SGP/SIRS/C1 - Reprocess: Adjust Direct Normal Irradiance
DataStreams:sgpsirsC1.00, sgp1swfanalsirs1longC1.c1, sgp15swfanalsirs1longC1.c1, sgpsirsC1.01
Description:
Direct normal broadband shortwave irradiance measured by NIP s/n 30722E6 was found to have 
a 0.62%% negative bias when compared in-situ with absolute cavity radiometer 
measurements taken on August 21, 2000.  The estimated measurement uncertainty of the calibration of 
NIP s/n 30722E6 on July 18, 2000 was -2.6% to +4.8%.  

Data from NIP s/n 30722E6 can be adjusted according to the in-situ comparisons to reduce 
the apparent measurement bias.
Suggestions: 
Multiply all direct normal irradiance measurements by 1.0062.
Measurements:sgp1swfanalsirs1longC1.c1:
  • dirfluxdn_measured
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sgpsirsC1.01:
  • Raw data stream - documentation not supported
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sgp15swfanalsirs1longC1.c1:
  • dirfluxdn_measured
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sgpsirsC1.00:
  • Raw data stream - documentation not supported
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