DQRID : D101222.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/21/2009000005/25/20092359Incorrect
05/15/2009000005/15/20092359Incorrect
05/04/2009000005/08/20092359Incorrect
04/23/2009000004/23/20092359Incorrect
more
Subject:
TWP/SWF/C2 - instrument grounding problem
DataStreams:twp1swfanalskyrad1longC2.c1, twp15swfanalskyrad1longC2.c1
Description:
A grounding problem with the skyrad data logger (discussed in DQR D090605.2) created 
intermittent anomalous voltages and incorrect flux data.  Measured all-sky fluxes and derived 
cloud fraction during these periods are incorrect. The identification of clear sky 
periods during these days and estimated clear sky fluxes may also be incorrect.  Days listed in 
this DQR are periods where bad data could be clearly identified; data from other days in 
this date range should be treated with caution.
Suggestions: 
Data is suspect during this time frame and cannot be corrected.  Disregard all 

measured fluxes and derived cloud fraction during this time frame.  Treat all derived clear 
sky fluxes during this time period with caution.
Measurements:twp15swfanalskyrad1longC2.c1:
  • guvbdn_measured
  • sswfluxdn_measured
  • difswfluxdn_cloudeffect
  • difcloudeffect_normalized
  • gswfluxdn_measured
  • cloudfraction
  • sswfluxdn_cloudeffect
  • dirfluxdn_measured
  • difswfluxdn_measured
  • difratiodn_measured_stdev
  • albedosw_measured
  • gswfluxdn_cloudeffect
  • difratiodn_measured
more
twp1swfanalskyrad1longC2.c1:
  • difswfluxdn_measured
  • difswfluxdn_cloudeffect
  • gswfluxdn_cloudeffect
  • dirfluxdn_measured
  • gswfluxdn_measured
  • sswfluxdn_measured
  • difratiodn_measured
  • albedosw_measured
  • guvbdn_measured
  • sswfluxdn_cloudeffect
more

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