DQRs for Session: 178477 User:shuaiy1Completed: 07-17-2016

Data Quality Reports for Session: 178477 User: shuaiy1 Completed: 07/17/2016

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D030917.6	SGP/BRS/C1 - Missing data due to Ice storm and clock problems	sgp15swfanalbrs1longC1.c1
D050502.3	SGP/BRS/C1 - SWFANAL Data description error	sgp15swfanalbrs1longC1.c1
D050502.9	SGP/SIRS/E15 - SWFANAL Data description error	sgp15swfanalsirs1longE15.c1
D120420.11	SGP/QCRAD/E15 - Direct normal irradiance intermittently low	sgpqcrad1longE15.s2

DQRID : D030917.6

Start Date	Start Time	End Date	End Time
03/13/2002	1800	03/14/2002	1500
03/09/2002	2000	03/10/2002	2348

Subject:	SGP/BRS/C1 - Missing data due to Ice storm and clock problems
DataStreams:	sgp15swfanalbrs1longC1.c1
Description:	Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems.
Measurements:	sgp15swfanalbrs1longC1.c1: Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit) difratiodn_measured time_offset time_offset_LST Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit) difratiodn_clearskyfit site guvbdn_clearskyfit Clear-sky Fit Estimated Sfc. Albedo from Shortwave Irrad. Measurements (calb)(albedosw_clearskyfit) sun_earth_distance base_time North latitude(lat) difratiodn_measured_stdev difswfluxdn_cloudeffect Irradiance, shortwave, downwelling, diffuse, measured(difswfluxdn_measured) nsamples_gswfluxdn_clearskyfit solar_cos_z gswfluxdn_cloudeffect base_time_LST difcloudeffect_normalized sswfluxdn_clearskyfit nsamples_cloudfraction Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured) sswfluxdn_measured Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured) sswfluxdn_cloudeffect Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured) Altitude above mean sea level(alt) guvbdn_measured nsamples_clearsky_detection East longitude(lon) nsamples_sswfluxdn_measured Fractional Sky Cover(cloudfraction) Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)

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DQRID : D050502.3

Start Date	Start Time	End Date	End Time
04/01/2001	0000	12/10/2003	2359

Subject:	SGP/BRS/C1 - SWFANAL Data description error
DataStreams:	sgp15swfanalbrs1longC1.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:	sgp15swfanalbrs1longC1.c1: sswfluxdn_cloudeffect difswfluxdn_cloudeffect gswfluxdn_cloudeffect

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DQRID : D050502.9

Start Date	Start Time	End Date	End Time
09/22/1995	0000	12/04/2003	2359

Subject:	SGP/SIRS/E15 - SWFANAL Data description error
DataStreams:	sgp15swfanalsirs1longE15.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:	sgp15swfanalsirs1longE15.c1: sswfluxdn_cloudeffect difswfluxdn_cloudeffect gswfluxdn_cloudeffect

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DQRID : D120420.11

Start Date	Start Time	End Date	End Time
04/11/2002	0000	05/01/2002	1100

Subject:	SGP/QCRAD/E15 - Direct normal irradiance intermittently low
DataStreams:	sgpqcrad1longE15.s2
Description:	Direct normal irradiance measurements appear to be intermittently too low and possibly incorrect during this time period. The cause is not known. No instrument DQRs currently exist describing the problem.
Measurements:	sgpqcrad1longE15.s2: Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

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