Data Quality Reports for Session: 101877 User: belmasri Completed: 10/05/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D021212.1NSA/GNDRAD/C1 - Instrument Maintenancensagndrad60sC1.a1, nsagndrad60sC1.b1
D021212.2NSA/GNDRAD/C1 - PSP erroneously replaced by B&Wnsagndrad60sC1.a1, nsagndrad60sC1.b1
D021212.3NSA/GNDRAD/C1 - Instrument maintenancensagndrad60sC1.a1, nsagndrad60sC1.b1
D021212.4NSA/GNDRAD/C1 - Bad calibrations appliednsagndrad60sC1.a1, nsagndrad60sC1.b1
D021212.9NSA/GNDRAD/C1 - PSP Data corrupted by brief spikensagndrad60sC1.a1, nsagndrad60sC1.b1
D030301.1NSA/GNDRAD/C1 - No power to IRTnsagndrad60sC1.a1, nsagndrad60sC1.b1
D031216.1NSA/GNDRAD/C1 - IRT cable failurensagndrad60sC1.b1
D031216.2NSA/GNDRAD/C1 - IRT returned to vendornsagndrad60sC1.b1
D040919.1NSA/GNDRAD/C1 - IRT power failurensagndrad60sC1.b1
D041013.3NSA/GNDRAD/C1 - Frosting/CondensationnsagndradC1.00, nsagndrad20sC1.a1, nsagndrad60sC1.b1
D060630.39NSA/GNDRAD/C1 - Reprocess: Longwave Calibration errornsagndrad60sC1.b1


DQRID : D021212.1
Start DateStart TimeEnd DateEnd Time
06/13/2001210006/13/20012200
Subject:
NSA/GNDRAD/C1 - Instrument Maintenance
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
Tip tower was lowered for instrument maintenance.  Data taken 
              during this period are corrupt.
Measurements:nsagndrad60sC1.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded maximum(psp1_max)
nsagndrad60sC1.a1:
  • PSP1 unshaded maximum(psp1_max)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D021212.2
Start DateStart TimeEnd DateEnd Time
06/13/2001230006/21/20011800
Subject:
NSA/GNDRAD/C1 - PSP erroneously replaced by B&W
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
The PSP was erroneously replaced with a B&W on 6/13 and then 
              changed back to the PSP on 6/21. Data should still be good since
              appropriate calibration factors were applied.
Measurements:nsagndrad60sC1.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded maximum(psp1_max)
nsagndrad60sC1.a1:
  • PSP1 unshaded maximum(psp1_max)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D021212.3
Start DateStart TimeEnd DateEnd Time
06/21/2001180006/21/20011830
Subject:
NSA/GNDRAD/C1 - Instrument maintenance
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
The tip tower was lowered for instrument maintenance.  Data
              recorded are garbage.
Measurements:nsagndrad60sC1.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded maximum(psp1_max)
nsagndrad60sC1.a1:
  • PSP1 unshaded maximum(psp1_max)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D021212.4
Start DateStart TimeEnd DateEnd Time
11/08/2001010011/09/20010300
Subject:
NSA/GNDRAD/C1 - Bad calibrations applied
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
Bad data due to erroneous calibration constant in configuration 
              file
Measurements:nsagndrad60sC1.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded standard deviation(pir1_sd)
  • PSP1 unshaded mean(psp1_mean)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded maximum(psp1_max)
nsagndrad60sC1.a1:
  • PSP1 unshaded maximum(psp1_max)
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded minimum(pir1_min)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D021212.9
Start DateStart TimeEnd DateEnd Time
11/07/2001210011/07/20012105
Subject:
NSA/GNDRAD/C1 - PSP Data corrupted by brief spike
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
Large unreasonable narrow spike in PSP data; cause not known.
Measurements:nsagndrad60sC1.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded maximum(psp1_max)
nsagndrad60sC1.a1:
  • PSP1 unshaded maximum(psp1_max)
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D030301.1
Start DateStart TimeEnd DateEnd Time
09/24/2002172511/16/20020003
Subject:
NSA/GNDRAD/C1 - No power to IRT
DataStreams:nsagndrad60sC1.a1, nsagndrad60sC1.b1
Description:
The data logger failed to supply power to the IRT.
Measurements:nsagndrad60sC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
nsagndrad60sC1.a1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)

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DQRID : D031216.1
Start DateStart TimeEnd DateEnd Time
05/27/2003140009/11/20031906
Subject:
NSA/GNDRAD/C1 - IRT cable failure
DataStreams:nsagndrad60sC1.b1
Description:
The IRT signal became very noisy and the problem was traced to the cable (after the 
instrument was returned to the vendor for diagnosis). The problem started occurring when ice 
surrounding the cable began to melt. The cable was repaired and the instrument reinstalled.
Measurements:nsagndrad60sC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)

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DQRID : D031216.2
Start DateStart TimeEnd DateEnd Time
09/11/2003190610/15/20030015
Subject:
NSA/GNDRAD/C1 - IRT returned to vendor
DataStreams:nsagndrad60sC1.b1
Description:
The IRT was returned to the vendor for diagnosis. It was found to be operating as expected 
and the signal noise problem was traced to the cable. The cable was repaired and the 
instrument reinstalled.
Measurements:nsagndrad60sC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)

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DQRID : D040919.1
Start DateStart TimeEnd DateEnd Time
09/15/2004000009/22/20040552
Subject:
NSA/GNDRAD/C1 - IRT power failure
DataStreams:nsagndrad60sC1.b1
Description:
After performing corrective maintenance which involved turning off power to the GNDRAD 
instruments and data logger, power to the IRT was not restored. The problem was corrected by 
replacing the data logger.
Measurements:nsagndrad60sC1.b1:
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)

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DQRID : D041013.3
Start DateStart TimeEnd DateEnd Time
10/09/2004000010/15/20042359
Subject:
NSA/GNDRAD/C1 - Frosting/Condensation
DataStreams:nsagndradC1.00, nsagndrad20sC1.a1, nsagndrad60sC1.b1
Description:
The GNDRAD PIR and IRT comparison was showing the IRT 2-4 W/m^2 greater than the PIR.  
Suspected snow or frost on the instrument(s).  Corrective maintenance performed 10/15/04 at 
21:30 UT.  Optics of both instruments were cleaned.  Upwelling longwave measurement 
agreement restored (+/- 5 W/^2).

Although the relative performance (agreement) of the two instruments improved after 
corrective maintenance (+/- 2 W/m^2), no correction is suggested because the agreement remains 
with the estimated measurement uncertainty of +/- 4 W/m^2 (IRT) and +/-10 W/m^2 (Inverted 
PIR)
Measurements:nsagndradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
nsagndrad60sC1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Net Radiation, Standard Deviation(net_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
nsagndrad20sC1.a1:
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
  • Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp)
  • Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
  • Instantaneous PIR1 dome thermistor(pir1_dome_therm)
  • Instantaneous PIR1 case thermistor(pir1_case_therm)

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DQRID : D060630.39
Start DateStart TimeEnd DateEnd Time
11/04/2004160012/21/20051855
Subject:
NSA/GNDRAD/C1 - Reprocess: Longwave Calibration error
DataStreams:nsagndrad60sC1.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:nsagndrad60sC1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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