Data Quality Reports for Session: 183195 User: ursan1 Completed: 02/04/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D120420.3SGP/QCRAD/C1 - Reprocess: SW data require -1 multiplersgpqcrad1longC1.s2Incorrect
D120420.4SGP/QCRAD/C1 - Upwelling SW cable problemsgpqcrad1longC1.s2Incorrect
D120420.5SGP/QCRAD/C1 - Sensor cable problemsgpqcrad1longC1.s2Incorrect
D120420.6SGP/QCRAD/C1 - SW direct normal data drop outsgpqcrad1longC1.s2Incorrect
D120420.7SGP/QCRAD/C1 - Failed upwelling SW cablesgpqcrad1longC1.s2Incorrect
D120420.8SGP/QCRAD/C1 - NIP failuresgpqcrad1longC1.s2Incorrect
D120510.5SGP/QCRAD/C1 - Case and dome temperatures not availablesgpqcrad1longC1.s2Suspect


DQRID : D120420.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/24/2000190005/08/20002359Incorrect
Subject:
SGP/QCRAD/C1 - Reprocess: SW data require -1 multipler
DataStreams:sgpqcrad1longC1.s2
Description:
Magnitude of data are correct, however, 2 wires were crossed producing negative values for 
SW Global Down, SW Global Up, SW Direct Normal, and SW Diffuse Down. Problem has been 
fixed at site.

Users of this data should multiply by -1 to get the correct values for SW Global Down, SW 
Global Up, SW Direct Normal, and SW Diffuse Down. Data will be reprocessed.

Documented in instrument DQR D000919.1.
Measurements:sgpqcrad1longC1.s2:
  • Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
  • Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
  • Shortwave Direct Normal Irradiance(short_direct_normal)
  • Upwelling shortwave hemispheric irradiance, pyranometer(up_short_hemisp)


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DQRID : D120420.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/13/2006090001/23/20071930Incorrect
Subject:
SGP/QCRAD/C1 - Upwelling SW cable problem
DataStreams:sgpqcrad1longC1.s2
Description:
Starting 11/13/2006, the C1 SIRS Upwelling Shortwave (up_short_hemisp) started to show 
large differences in comparison to co-located E13 SIRS and C1 IRT25m.  After much 
troubleshooting and gnashing of teeth it was discovered that rodents had chewed through the 
instrument cables at the bottom of the tilt tower. Cables were replaced 01/23/2007 1930GMT.

Documented in instrument DQR D061121.2
Measurements:sgpqcrad1longC1.s2:
  • Upwelling shortwave hemispheric irradiance, pyranometer(up_short_hemisp)


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DQRID : D120420.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/03/2007140004/22/20082052Incorrect
Subject:
SGP/QCRAD/C1 - Sensor cable problem
DataStreams:sgpqcrad1longC1.s2
Description:
Beginning October 3, 2007, the upwelling longwave irradiance (up_long_hemisp, aka "UIR") 
started to spike to unreasonable values positively offset from the co-located E13 by over 
100W/m2.  On January 17 2008 the UIR values become consistently bad due to bad UIR dome 
thermistor wiring.  Problem appears as a resistive offset in the dome thermistor but due 
to nature of failure (unknown cable problem) data correction would not yield any better 
data than the co-located E13 UIR instrument that is known to be operating correctly. 
Instrument cable replacement on 4/22 fixed the problem.

Thermopile data (netIR) from this instrument is good.  However, incoming irradiance data 
is not correctable due to bad UIR dome thermistor wiring within the instrument cable. 

Documented in instrument DQR D071022.4.
Measurements:sgpqcrad1longC1.s2:
  • Upwelling longwave hemispheric irradiance, pyrgeometer(up_long_hemisp)


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DQRID : D120420.6
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/18/2009175107/31/20091645Incorrect
Subject:
SGP/QCRAD/C1 - SW direct normal data drop out
DataStreams:sgpqcrad1longC1.s2
Description:
NIP cable had failed during this time period.  Short_direct_normal data are not 
recoverable during this time period. However, it can be reconstructed using the following formula 
for each one minute data:
   short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(zenith angle)

Documented in instrument DQR D090623.1
Measurements:sgpqcrad1longC1.s2:
  • Shortwave Direct Normal Irradiance(short_direct_normal)


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DQRID : D120420.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/20/2010041406/30/20101442Incorrect
Subject:
SGP/QCRAD/C1 - Failed upwelling SW cable
DataStreams:sgpqcrad1longC1.s2
Description:
The upwelling shortwave hemispheric (up_short_hemisp) data were missing or incorrect due 
to a bad cable.  Cable was replaced on 6/30 and the problem was resolved.

Documented in instrument DQR D100701.1
Measurements:sgpqcrad1longC1.s2:
  • Upwelling shortwave hemispheric irradiance, pyranometer(up_short_hemisp)


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DQRID : D120420.8
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/12/2011000006/24/20111740Incorrect
Subject:
SGP/QCRAD/C1 - NIP failure
DataStreams:sgpqcrad1longC1.s2
Description:
The short_direct_normal (NIP instrument) cable failed during this time period.	Data are 
not recoverable.

Users can derive an estimate of direct normal values using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)

Documented in instrument DQR D110628.2
Measurements:sgpqcrad1longC1.s2:
  • Shortwave Direct Normal Irradiance(short_direct_normal)


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DQRID : D120510.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/01/1999000012/31/20002359Suspect
Subject:
SGP/QCRAD/C1 - Case and dome temperatures not available
DataStreams:sgpqcrad1longC1.s2
Description:
Longwave downwelling and upwelling case and dome temperatures are not available during 
this time period because they were not kept in the sirs.a1 files and sirs.b1 files are not 
available. This means that some longwave tests and corrections can't be applied.
Measurements:sgpqcrad1longC1.s2:
  • LWupTd
  • LWupTc
  • LWdnTd
  • LWdnTc
  • Upwelling longwave hemispheric irradiance, pyrgeometer(up_long_hemisp)
  • Downwelling longwave hemispheric irradiance, pyrgeometer(down_long_hemisp)


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