Data Quality Reports for Session: 104510 User: elena Completed: 02/27/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D010907.4 "bsrn" platform at SGP data problemsgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1, sgpbsrn1duttC1.c1
D050420.2SGP/BSRN/C1 - Reprocess: Adjust Direct Normal IrradiancesgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1


DQRID : D010907.4
Start DateStart TimeEnd DateEnd Time
10/01/1998000001/22/20012359
Subject:
"bsrn" platform at SGP data problem
DataStreams:sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1, sgpbsrn1duttC1.c1
Description:
As reported in ARM Technical Report ARM-TR-002, the 'bsrn' data at the SGP CF
was not in agreement with the co-located SIRS E13 and C1 data. Subsequent
discussion led to the conclusion that ther was a voltage problem with the
'bsrn' data logger. In development and testing of the Diffuse Correction and
Best Estimate Flux VAPs, it has been shown that all 'bsrn' data, all
instruments, suffered this data logger problem. The result is noisy and
slightly offset values, seemingly at random throughout the period from October
1998 through the end of the 'bsrn' data stream and it's replacement by the BRS
system. All this data needs to be colored 'questionable', and all data users
need to be informed that either the SIRS E13 or SIRS C1 data should be used
instead.
Measurements:sgpbsrnC1.a0:
  • Average reference voltage(vref)
  • Standard deviation for pyrgeometer thermopile(ssig)
  • Downwelling hemispheric infrared irradiance(psig)
  • Battery Voltage (of 60m battery) for QA/QC purposes(vbat)
  • Observed direct-beam normal solar irradiance(nip)
  • CALCULATED downwelling hemispheric diffuse solar irradiance(psp1)
  • Standard deviation for pyrgeometer dome thermistor resistance(stdome)
  • Standard deviation for pyrgeometer case thermistor resistance(stcase)
  • Standard deviation for reference(svref)
  • Observed downwelling hemispheric total solar irradiance (direct+diffuse)(psp2)
  • Standard deviation for pyrheliometer(snip)
  • Average pyrgeometer dome thermistor resistance(ptdome)
  • Standard deviation for shaded pyranometer(spsp1)
  • Standard deviation for unshaded pyranometer(spsp2)
  • Average pyrgeometer case thermistor resistance(ptcase)

sgpbsrnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpbsrn1duttC1.c1:
  • Calculated Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer
    from 20s data(calculated_down_long_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Full
    corrected (Weighted Mean absolute deviation using Median)(dsdh_full_corrected)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Detector flux (Down-welling pyrgeometer thermopile voltage * PIR-DIR calib-coef)
    Calculated value from 20s data(detector_flux)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Ventilated Pyrgeometer Case Temperature(case_temperature)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_long_hemisp_max)
  • Effective temperature(effective_temperature)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_long_hemisp_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_long_hemisp_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Ventilated Pyrgeometer Dome Temperature(dome_temperature)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Dutton
    corrected(dsdh_dutton_corrected)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)

sgpbsrnC1.a1:
  • CALCULATED downwelling hemispheric diffuse solar irradiance(psp1)
  • Observed direct-beam normal solar irradiance(nip)
  • Downwelling hemispheric infrared irradiance(psig)
  • Observed downwelling hemispheric total solar irradiance (direct+diffuse)(psp2)


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DQRID : D050420.2
Start DateStart TimeEnd DateEnd Time
07/28/2000143001/22/20011739
Subject:
SGP/BSRN/C1 - Reprocess: Adjust Direct Normal Irradiance
DataStreams:sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1
Description:
Direct normal broadband shortwave irradiance measured by NIP s/n 30721E6 was found to have 
a 4.1% negative bias when compared in-situ with absolute cavity radiometer measurements 
taken on August 21, 2000.  The estimated measurement uncertainty of the calibration of 
NIP s/n 30721E6 on July 18, 2000 was -2.8% to +3.5%.  The additional uncertainties of the 
field (rather than calibration) data acquisition system and installation contribute to the 
large negative bias found in the data on August 21, 2000.

Data from NIP s/n 30721E6 can be adjusted according to the in-situ comparisons to reduce 
the apparent measurement bias.
Measurements:sgpbsrnC1.a0:
  • Observed direct-beam normal solar irradiance(nip)

sgpbsrnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

sgpbsrnC1.a1:
  • Observed direct-beam normal solar irradiance(nip)


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