Data Quality Reports for Session: 115569 User: sherman Completed: 11/07/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050205.4SGP/SIRS/E18 - Possible PSP dome contaminationsgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1
D060630.24SGP/SIRS/E18 - Reprocessed: Longwave Calibration errorsgpsirsE18.b1
D061115.2SGP/SIRS/E18 - Upwelling SW cable severedsgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1
D070130.2SGP/SIRS/E18 - Noise in upwelling longwave datasgpsirs20sE18.a0, sgpsirsE18.b1
D071221.2SGP/SIRS/E18 - Instrument noise problemsgpsirs20sE18.a0, sgpsirsE18.b1


DQRID : D050205.4
Start DateStart TimeEnd DateEnd Time
02/03/2005120002/15/20052250
Subject:
SGP/SIRS/E18 - Possible PSP dome contamination
DataStreams:sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1
Description:
Downwelling shortwave hemispheric (DSH) measurements did not agree with derived DSH 
readings during the morning hours up to 1500GMT each clear day.   PM cleaning on 2/16 2250 
revealed nothing other than dirty water spots.  A dirty or ice covered PSP dome may have been 
the cause, clearing itself before the PM crew arrived.
Measurements:sgpsirs20sE18.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
sgpsirsE18.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
sgpsirsE18.00:
  • null(Raw data stream - documentation not supported)

Back To Table of Contents

DQRID : D060630.24
Start DateStart TimeEnd DateEnd Time
07/22/2003220002/14/20062100
Subject:
SGP/SIRS/E18 - Reprocessed: Longwave Calibration error
DataStreams:sgpsirsE18.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in July 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 have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.
Measurements:sgpsirsE18.b1:
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)

Back To Table of Contents

DQRID : D061115.2
Start DateStart TimeEnd DateEnd Time
11/07/2006010011/20/20062300
Subject:
SGP/SIRS/E18 - Upwelling SW cable severed
DataStreams:sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1
Description:
The Upwelling Shortwave signal was exceeding physical limits.  Ops reported the upwelling 
shortwave cable was damaged by rodents. The cable was repaired and returned to service.
Measurements:sgpsirs20sE18.a0:
  • Instantaneous Upwelling Shortwave Hemispheric Irradiance, Pyranometer(inst_up_short_hemisp)
sgpsirsE18.b1:
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard
    Deviation(up_short_hemisp_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
sgpsirsE18.00:
  • null(Raw data stream - documentation not supported)

Back To Table of Contents

DQRID : D070130.2
Start DateStart TimeEnd DateEnd Time
01/18/2007223007/24/20071400
Subject:
SGP/SIRS/E18 - Noise in upwelling longwave data
DataStreams:sgpsirs20sE18.a0, sgpsirsE18.b1
Description:
After restart due to ice storm the upwelling longwave case and dome thermistors 
experienced intermittent noise. Last seen 7/24/2007, the noise is intermittent and can last several 
days.  When noise is not apparent, upwelling longwave measurements appear normal.

Only using upwelling longwave data that has been processed with ARMs qcrad VAP during this 
time period.  Or, disregard upwelling longwave data during this time.
Measurements:sgpsirs20sE18.a0:
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
  • Instantaneous Upwelling Pyrgeometer Thermopile(inst_up_long_hemisp_tp)
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
sgpsirsE18.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard
    Deviation(up_long_hemisp_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)

Back To Table of Contents

DQRID : D071221.2
Start DateStart TimeEnd DateEnd Time
05/12/2007103001/02/20082240
Subject:
SGP/SIRS/E18 - Instrument noise problem
DataStreams:sgpsirs20sE18.a0, sgpsirsE18.b1
Description:
Starting May 12th 2007 DIR experiencing persistent, intermittent data dropouts and noise.  
PM found a damaged PIR cable and repaired 01/02/08 2240GMT. 

Noise seems to be unbiased and dropouts are beyond QC limits making QC flags a possible 
option in filtering for good data. However, using data during this period is not 
recommended.
Measurements:sgpsirsE18.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
sgpsirs20sE18.a0:
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)

Back To Table of Contents


END OF DATA