Data Quality Reports for Session: 101124 User: harish Completed: 08/15/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D051229.5NIM/MFRSR/M1 - Instrument not shading properlynimmfrsrM1.00, nimmfrsrM1.a0, nimmfrsrM1.b1
D060222.1NIM/SKYRAD/M1 - Instrument ventilator problemnimskyradM1.00, nimskyrad20sM1.a0, nimskyrad60sM1.b1
D060630.41NIM/SKYRAD/M1 - Reprocess: Longwave Calibration errornimskyrad60sM1.b1


DQRID : D051229.5
Start DateStart TimeEnd DateEnd Time
11/25/2005150002/01/20061130
Subject:
NIM/MFRSR/M1 - Instrument not shading properly
DataStreams:nimmfrsrM1.00, nimmfrsrM1.a0, nimmfrsrM1.b1
Description:
Shadowband not shading properly between 0830 and 1500.  Do not use diffuse or direct data 
in this range.  Maintenance on 2/1/2006 resolved the problem.
Measurements:nimmfrsrM1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

nimmfrsrM1.a0:
  • Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
  • Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
  • Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
  • Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
  • Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
    broadband scale applied(diffuse_hemisp_broadband)
  • Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
  • Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
  • Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
  • Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)

nimmfrsrM1.b1:
  • Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
  • Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
  • Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
  • Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
  • Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
    broadband scale applied(diffuse_hemisp_broadband)
  • Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
  • Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
  • Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
  • Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
  • Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)


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DQRID : D060222.1
Start DateStart TimeEnd DateEnd Time
12/23/2005000002/23/20060800
Subject:
NIM/SKYRAD/M1 - Instrument ventilator problem
DataStreams:nimskyradM1.00, nimskyrad20sM1.a0, nimskyrad60sM1.b1
Description:
Data quality office first reported that PIR1 and PIR2 appear to be deviating more than 
typical during the daylight hours.  It was found that the Skyrad PIR ventilator fans were 
building up debris on the intake air filter.  Obstructed air flow results in solar heating 
of the PIR ventilator housing in the later part of the day and biasing the incomming IR 
irradiance values. The slow buildup was insidious and wasn't discovered and corrected 
(i.e. ventilator fans cleaned on a regular and frequent basis) until Feb 23rd. On or around 
December 23rd was when this problem may have first started.  We are unable to quantify the 
extent of the problem in W/m2.  Normal deviation between PIRs is typically 3-5 W/m2.
Measurements:nimskyrad20sM1.a0:
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)

nimskyrad60sM1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_temp)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_temp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_temp)

nimskyradM1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D060630.41
Start DateStart TimeEnd DateEnd Time
11/26/2005150012/22/20051100
Subject:
NIM/SKYRAD/M1 - Reprocess: Longwave Calibration error
DataStreams:nimskyrad60sM1.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:nimskyrad60sM1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)


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