Data Quality Reports for Session: 102176 User: roujean Completed: 10/18/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050815.1TWP/GNDRAD/C2 - IRT power supply failedtwpgndradC2.00, twpgndrad60sC2.b1
D050919.4TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacementtwpgndrad60sC3.b1
D050926.6TWP/GNDRAD/C2 - Gndrad inverted for radiometertwpgndrad60sC2.b1
D051123.2TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometerstwpgndrad60sC1.b1
D051206.5TWP/GNDRAD/C3 - IRT malfunctiontwpgndrad60sC3.b1
D060111.1TWP/GNDRAD/C3 - IRT powertwpgndrad60sC3.b1
D060630.34TWP/GNDRAD/C1 - Reprocess: Longwave Calibration errortwpgndrad60sC1.b1
D060630.35TWP/GNDRAD/C2 - Reprocess: Longwave Calibration errortwpgndrad60sC2.b1
D060630.36TWP/GNDRAD/C3 - Reprocess: Longwave Calibration errortwpgndrad60sC3.b1


DQRID : D050815.1
Start DateStart TimeEnd DateEnd Time
08/11/2005164808/16/20052230
Subject:
TWP/GNDRAD/C2 - IRT power supply failed
DataStreams:twpgndradC2.00, twpgndrad60sC2.b1
Description:
The IRT output dropped to its minimum output of 223 K (0 volts).  It was determined the 24 
V DC converter had failed.  The converter was replaced on 16 August and the instrument 
began reporting normally again.  The IRT data are unusable during the five day period when 
the DC converter was faulty.

The GNDRAD (down-looking) IRT is used primarily for surface temperature.  The PIR can be 
used for this purpose by inverting the IR flux equation, Flux = sigma*temperature^4 where 
sigma = 5.67x10-8 W/m^2K^4.  But, unlike the IRT, the PIR measurement is strongly 
effected by the air temperature in addition to the surface temperature.  At night, when the air 
temperature approaches the surface temperature, the PIR provides a good estimate of the 
surface temperature.  During the day, however, the PIR tends to underestimate the ground 
temperature,  particularly on sunny days.  The magnitude of the underestimate can be 
estimated by evaluating periods when both instruments are operating but is typically on the 
order of 5-10C.
Measurements:twpgndradC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpgndrad60sC2.b1:
  • IRT1 maximum(irt1_max)
  • IRT1 mean(irt1_mean)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)

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DQRID : D050919.4
Start DateStart TimeEnd DateEnd Time
08/05/2005003008/05/20050200
08/09/2005000008/09/20050200
Subject:
TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement
DataStreams:twpgndrad60sC3.b1
Description:
The tower at Darwin was brought down to test and replace the Gndrad PIR on 8/5/2005 and 
the PSP on 8/9/2005
Measurements:twpgndrad60sC3.b1:
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

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DQRID : D050926.6
Start DateStart TimeEnd DateEnd Time
09/17/2005015209/23/20050115
Subject:
TWP/GNDRAD/C2 - Gndrad inverted for radiometer
DataStreams:twpgndrad60sC2.b1
Description:
Gndrad instruments PIR and PSP inverted for replacement instrument
installation and comparison
Measurements:twpgndrad60sC2.b1:
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • PSP1 unshaded maximum(psp1_max)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • PIR1 unshaded minimum(pir1_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • PIR1 unshaded mean(pir1_mean)
  • PSP1 unshaded standard deviation(psp1_sd)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • PIR1 unshaded standard deviation(pir1_sd)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • PIR1 unshaded maximum(pir1_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • PSP1 unshaded minimum(psp1_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • PSP1 unshaded mean(psp1_mean)

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DQRID : D051123.2
Start DateStart TimeEnd DateEnd Time
11/11/2005223011/17/20050030
Subject:
TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometers
DataStreams:twpgndrad60sC1.b1
Description:
Radiometers GNDRAD PIR and PSP inverted for radiometer comparison
Measurements:twpgndrad60sC1.b1:
  • NET standard deviation(net_sd)
  • Net Radiation, Maxima(net_max)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • PIR1 unshaded mean(pir1_mean)
  • PSP1 unshaded maximum(psp1_max)
  • PIR1 unshaded maximum(pir1_max)
  • Net Radiation, Minima(net_min)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • PSP1 unshaded mean(psp1_mean)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • PIR1 unshaded standard deviation(pir1_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)
  • Net Radiation, Standard Deviation(net_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Net Radiation(net)
  • PIR1 unshaded minimum(pir1_min)
  • NET mean(net_mean)

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DQRID : D051206.5
Start DateStart TimeEnd DateEnd Time
11/21/2005150012/05/20050100
Subject:
TWP/GNDRAD/C3 - IRT malfunction
DataStreams:twpgndrad60sC3.b1
Description:
The internal IRT power supply failed (probably due to a lightning strike on 11/14) and was 
drawing excessive current on the data logger's DC system. The problem was corrected by 
replacing the instrument with a spare.
Measurements:twpgndrad60sC3.b1:
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

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DQRID : D060111.1
Start DateStart TimeEnd DateEnd Time
12/20/2005233001/02/20062300
Subject:
TWP/GNDRAD/C3 - IRT power
DataStreams:twpgndrad60sC3.b1
Description:
The IRT failed to report after a planned power outage to add lightning protection modules 
to the AC power wiring. The problem was corrected when a loose power connection to the 
logger was found, rectified, and power restored to the logger.
Measurements:twpgndrad60sC3.b1:
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

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DQRID : D060630.34
Start DateStart TimeEnd DateEnd Time
08/02/2004070012/21/20052204
Subject:
TWP/GNDRAD/C1 - Reprocess: Longwave Calibration error
DataStreams:twpgndrad60sC1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:twpgndrad60sC1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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DQRID : D060630.35
Start DateStart TimeEnd DateEnd Time
07/05/2004220212/21/20052149
Subject:
TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error
DataStreams:twpgndrad60sC2.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:twpgndrad60sC2.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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DQRID : D060630.36
Start DateStart TimeEnd DateEnd Time
05/20/2004010012/21/20052137
Subject:
TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error
DataStreams:twpgndrad60sC3.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:twpgndrad60sC3.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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