Data Quality Reports for Session: 155070 User: zhuw1 Completed: 12/05/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020905.4SGP/IRT10m/C1 - Reprocess: IRT insufficiently insulated sgpirt10mC1.b1
D060414.6SGP/IRT/C1 - changed output range for new dataloggersgpirt10mC1.a1, sgpirt10mC1.b1
D060828.2SGP/IRT/C1 - UPS failingsgpirt10mC1.b1
D120113.6SGP/IRT/C1 - Noisy 10m IRT datasgpirt10mC1.b1
D121022.1SGP/IRT/C1 - Measurement rangesgpirt10mC1.b1, sgpirt25mC1.b1
D130211.1SGP/IRT/C1 - 10m IRT ground surface temperaturesgpirt10mC1.b1
D130806.2SGP/IRT/C1 - Noisy datasgpirt10mC1.b1


DQRID : D020905.4
Start DateStart TimeEnd DateEnd Time
05/19/1997000012/24/19981845
Subject:
SGP/IRT10m/C1 - Reprocess: IRT insufficiently insulated
DataStreams:sgpirt10mC1.b1
Description:
The upwelling IRT on the 10m tower was insufficiently insulated to maintain an internal 
reference temperature above 0 degrees C. Measurements of surface temperature were 
over-estimated when instrument was below freezing.

Data will be reprocessed, but users can correct data using the following correction 
factor:

If T_reference < -5?C, then

  IRT_corrected = (IRT_original - 32.993K)/0.87238

where T_reference can be estimated with ambient temperature (e.g.
inst_up_long_hemisp_dome_temp or inst_up_long_dome_temp from SGP.E13 SIRS)
Measurements:sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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DQRID : D060414.6
Start DateStart TimeEnd DateEnd Time
09/27/2001141609/27/20011456
Subject:
SGP/IRT/C1 - changed output range for new datalogger
DataStreams:sgpirt10mC1.a1, sgpirt10mC1.b1
Description:
The tower was lowered and the analog output parameters were changed at 14:45 to compensate 
for the recent change in data acquisition from an MFR logger to a CR10X.
Measurements:sgpirt10mC1.a1:
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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DQRID : D060828.2
Start DateStart TimeEnd DateEnd Time
08/26/2006085309/18/20061530
Subject:
SGP/IRT/C1 - UPS failing
DataStreams:sgpirt10mC1.b1
Description:
The IRT data were intermittently bad during this period due to a failing UPS. The problem 
was corrected by replacing the UPS.
Measurements:sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • internal_voltage
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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DQRID : D120113.6
Start DateStart TimeEnd DateEnd Time
01/03/2012153001/04/20122030
Subject:
SGP/IRT/C1 - Noisy 10m IRT data
DataStreams:sgpirt10mC1.b1
Description:
The 10M IRT surface temperatures were very noisy because the connection to the data logger 
had become loose.
Measurements:sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • internal_voltage
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • logger_temp

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DQRID : D121022.1
Start DateStart TimeEnd DateEnd Time
06/25/2012180008/04/20122059
Subject:
SGP/IRT/C1 - Measurement range
DataStreams:sgpirt10mC1.b1, sgpirt25mC1.b1
Description:
The ground surface temperature exceeded the maximum measurement of 50C on some days. The 
maximum was increased to 60C for IRT10m on 10/1/2012 at 15:25 and for IRT25m on 10/9/2012 
at 21:45.
Measurements:sgpirt25mC1.b1:
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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DQRID : D130211.1
Start DateStart TimeEnd DateEnd Time
11/11/2012075002/08/20131525
Subject:
SGP/IRT/C1 - 10m IRT ground surface temperature
DataStreams:sgpirt10mC1.b1
Description:
The 10m IRT was measuring lower ground surface temperature than the 25m IRT. The lens was 
cleaned on 12/19/2012 and replaced on 2/8/2013 but the difference in temperature appears 
to be due to the seasonal difference in surface cover - tall grass vesus bare soil.
Measurements:sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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DQRID : D130806.2
Start DateStart TimeEnd DateEnd Time
07/05/2011160307/14/20110303
07/26/2011202107/26/20112310
08/03/2011224208/12/20110627
Subject:
SGP/IRT/C1 - Noisy data
DataStreams:sgpirt10mC1.b1
Description:
The power supplied to the data logger was very "noisy" causing the surface temperature 
measurements to also be "noisy".
Measurements:sgpirt10mC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • internal_voltage
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)

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