Data Quality Reports for Session: 112127 User: sloehrer Completed: 05/22/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050105.2SGP/IRT/C1 - Reprocess: Some min and max values swappedsgpirtC1.b1
D061214.3SGP/IRT/E19 - Reprocess: Calibration errorsgpirt200msE19.a1, sgpirtE19.b1
D070529.2SGP/IRT/E16 - computer failuresgpirt200msE16.a1, sgpirtE16.b1
D070912.1SGP/IRT/E13 - Power supply failedsgpirt200msE13.a1, sgpirtE13.b1
D071031.3SGP/IRT/E15 - Power supply failedsgpirt200msE15.a1, sgpirtE15.b1
D071217.6SGP/IRT/E15 - Instrument noise problemsgpirt200msE15.a1, sgpirtE15.00, sgpirtE15.b1
D080131.1SGP/IRT/E13 - Reprocess: Sky temperature biassgpirt200msE13.a1, sgpirtE13.b1


DQRID : D050105.2
Start DateStart TimeEnd DateEnd Time
12/18/2003160302/02/20052359
Subject:
SGP/IRT/C1 - Reprocess: Some min and max values swapped
DataStreams:sgpirtC1.b1
Description:
During the time period specified the minimum and maximum sky_ir_temp
values for the first record of each hour are swapped with the minimum
being reported as sky_ir_temp_max and the maximum being reported as
sky_ir_temp_min.
Measurements:sgpirtC1.b1:
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)

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DQRID : D061214.3
Start DateStart TimeEnd DateEnd Time
12/01/2005000004/27/20071618
Subject:
SGP/IRT/E19 - Reprocess: Calibration error
DataStreams:sgpirt200msE19.a1, sgpirtE19.b1
Description:
The IRT was measuring ~20K higher sky temperatures than at other nearby extended facilies. 
The calibration of the instrument was incorrect. The problem was corrected by replacing 
the IRT.

The offset in the calibration will be determined and the data will be corrected.
Measurements:sgpirt200msE19.a1:
  • Sky Infra-Red Temperature(sky_ir_temp)
sgpirtE19.b1:
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)

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DQRID : D070529.2
Start DateStart TimeEnd DateEnd Time
07/14/2006060004/11/20071559
Subject:
SGP/IRT/E16 - computer failure
DataStreams:sgpirt200msE16.a1, sgpirtE16.b1
Description:
The serial ports of the computer failed so no data were collected. The problem was solved 
when the computer was replaced.
Measurements:sgpirt200msE16.a1:
  • base time(base_time)
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • lat(lat)
  • Dummy altitude for Zeb(alt)
  • lon(lon)
  • time(time)
  • Time offset of tweaks from base_time(time_offset)
  • Sky Infra-Red Temperature(sky_ir_temp)
sgpirtE16.b1:
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Time offset of tweaks from base_time(time_offset)
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • lat(lat)
  • Number of Samples Averaged(samples_in_average)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • lon(lon)
  • Standard Deviation of Internal Reference Infra Red Temperature(ref_ir_temp_std)
  • base time(base_time)
  • Dummy altitude for Zeb(alt)
  • time(time)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

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DQRID : D070912.1
Start DateStart TimeEnd DateEnd Time
08/24/2007025011/02/20072030
Subject:
SGP/IRT/E13 - Power supply failed
DataStreams:sgpirt200msE13.a1, sgpirtE13.b1
Description:
The IRT data were largely missing due to a failing UPS.  The problem was corrected when 
the UPS was replaced.
Measurements:sgpirt200msE13.a1:
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • base time(base_time)
  • time(time)
  • Dummy altitude for Zeb(alt)
  • Time offset of tweaks from base_time(time_offset)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • lon(lon)
  • lat(lat)
sgpirtE13.b1:
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • lat(lat)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • base time(base_time)
  • Number of Samples Averaged(samples_in_average)
  • Dummy altitude for Zeb(alt)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • Standard Deviation of Internal Reference Infra Red Temperature(ref_ir_temp_std)
  • time(time)

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DQRID : D071031.3
Start DateStart TimeEnd DateEnd Time
09/01/2007143009/26/20071704
10/10/2007160410/23/20071704
10/31/2007170411/06/20072104
Subject:
SGP/IRT/E15 - Power supply failed
DataStreams:sgpirt200msE15.a1, sgpirtE15.b1
Description:
The IRT data were largely missing due to a failing UPS.  The problem was corrected when 
the UPS was replaced.
Measurements:sgpirtE15.b1:
  • Number of Samples Averaged(samples_in_average)
  • time(time)
  • lon(lon)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • Standard Deviation of Internal Reference Infra Red Temperature(ref_ir_temp_std)
  • base time(base_time)
  • lat(lat)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Dummy altitude for Zeb(alt)
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Time offset of tweaks from base_time(time_offset)
sgpirt200msE15.a1:
  • time(time)
  • Internal Reference Infra Red Temperature(ref_ir_temp)
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • lon(lon)
  • lat(lat)
  • Time offset of tweaks from base_time(time_offset)
  • Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D071217.6
Start DateStart TimeEnd DateEnd Time
07/12/2005153003/28/20081722
Subject:
SGP/IRT/E15 - Instrument noise problem
DataStreams:sgpirt200msE15.a1, sgpirtE15.00, sgpirtE15.b1
Description:
The data was much noisier than other nearby sites (a factor of 4-5 times more). The 
connections and communication and other settings were checked. The IRT was replaced on 
1/29/2008 at 17:37 but the response time was incorrectly set to 0.01 s. This problem was 
corrected when the setting was changed to 0.10 s.
Measurements:sgpirtE15.b1:
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra-Red Temperature(sky_ir_temp)
sgpirt200msE15.a1:
  • Sky Infra-Red Temperature(sky_ir_temp)
sgpirtE15.00:
  • Raw data stream - documentation not supported(raw)

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DQRID : D080131.1
Start DateStart TimeEnd DateEnd Time
01/11/2006000007/25/20072315
Subject:
SGP/IRT/E13 - Reprocess: Sky temperature bias
DataStreams:sgpirt200msE13.a1, sgpirtE13.b1
Description:
Measurements of sky temperature, especially those <250K,, were positively biased compared 
with AERI because there was no compensation for the effect of the emissivity and 
temperature of the gold mirror. The problem was corrected by changing the IRT emissivity from 
1.000 to 0.987, adding an RTD and transmitter electronics to measure the temperature of the 
mirror, and changing the ambient temperature measurement for internal reference to 
external mirror temperature.

Use sky temperature measurements less than 230K with caution. Biases as large as 30K have 
been observed when the actual temperature, as measured by AERI, is less than 210 K.
Measurements:sgpirt200msE13.a1:
  • Sky Infra-Red Temperature(sky_ir_temp)
sgpirtE13.b1:
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)

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