DQRID : D050502.18
Start DateStart TimeEnd DateEnd Time
05/16/2003000012/23/20032359
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Subject:
SGP/SIRS/E27 - SWFANAL Data description error
DataStreams:sgp1swfanalsirs1longE27.c1, sgp15swfanalsirs1longE27.c1
Description:
The long name attribute for the cloud effect fields incorrectly
defines the cloud effect to be the difference between the 
clearskyfit and measured values:
   
"Difference: ***fluxdn_clearskyfit - ***fluxdn_measured (***fcg)" ;
   
The cloud effects are correctly calculated by subtracting the
irradiance calculated in the clear sky fit from the measured 
irradiance.
   
"Difference: ***fluxdn_measured - ***fluxdn_clearskyfit (***fcg)" ;
   
NOTE: this is just a documentation error.  The data are correctly
calculated.
Suggestions: 
Measurements:sgp1swfanalsirs1longE27.c1:
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • Difference: sswfluxdn_clearskyfit - sswfluxdn_measured (sswfcg)(sswfluxdn_cloudeffect)
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
more
sgp15swfanalsirs1longE27.c1:
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • Difference: sswfluxdn_clearskyfit - sswfluxdn_measured (sswfcg)(sswfluxdn_cloudeffect)
more

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