Data Quality Reports for Session: 113831 User: lkberg Completed: 08/25/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050420.3SGP/SIRS/C1 - Reprocess: Adjust Direct Normal Irradiancesgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.c1, sgpsirsC1.00, sgpsirsC1.01
D050502.2SGP/SIRS/C1 - SWFANAL Data description errorsgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.c1


DQRID : D050420.3
Start DateStart TimeEnd DateEnd Time
08/03/2000130008/15/20011350
Subject:
SGP/SIRS/C1 - Reprocess: Adjust Direct Normal Irradiance
DataStreams:sgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.c1, sgpsirsC1.00, 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.
Measurements:sgpsirsC1.01:
  • null(Raw data stream - documentation not supported)
sgp1swfanalsirs1longC1.c1:
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
sgpsirsC1.00:
  • null(Raw data stream - documentation not supported)
sgp15swfanalsirs1longC1.c1:
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)

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DQRID : D050502.2
Start DateStart TimeEnd DateEnd Time
03/25/1997000012/10/20032359
Subject:
SGP/SIRS/C1 - SWFANAL Data description error
DataStreams:sgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.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.
Measurements:sgp1swfanalsirs1longC1.c1:
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
sgp15swfanalsirs1longC1.c1:
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)

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