Data Quality Reports for Session: 180432 User: rebecca1se Completed: 10/12/2016

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D110815.3SGP/AOS/C1 - Nephelometer shutter errorsgpnoaaaosC1.b1Suspect
D120608.1SGP/AOS/C1 - CPC leaksgpnoaaaosC1.b1Incorrect


DQRID : D110815.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/25/2011000008/03/20110000Suspect
Subject:
SGP/AOS/C1 - Nephelometer shutter error
DataStreams:sgpnoaaaosC1.b1
Description:
The neph backscatter shutter started to fail which resulted in large background values in 
the dry nephelometer. The data is poor quality even though it may look ok.

Instead use the data in the wet nephelometer. Note that during some of this time period 
the RH value inside of this neph ramped up and down so use data at the low RH values.
Measurements:sgpnoaaaosC1.b1:
  • Back-scattering coefficient, blue wavelength, low RH, 10 um size cut(Bbs_B_Dry_10um_Neph3W_1)
  • Aerosol total light scattering coefficient, reference nephelometer red channel,
    10 um particle diameter(Bs_R_Dry_10um_Neph3W_1)
  • Total scattering coefficient, blue wavelength, low RH, 1 um size cut(Bs_B_Dry_1um_Neph3W_1)
  • Back-scattering coefficient, blue wavelength, low RH, 1 um size cut(Bbs_B_Dry_1um_Neph3W_1)
  • Aerosol backwards-hemispheric light scattering coefficient, reference
    nephelometer red channel, 10 um particle diameter(Bbs_R_Dry_10um_Neph3W_1)
  • Aerosol total light scattering coefficient, ref. humidograph nephelometer red
    channel, 1 um particle diameter(Bs_R_Dry_1um_Neph3W_1)
  • Aerosol total light scattering coefficient, reference nephelometer blue channel,
    10 um particle diam(Bs_B_Dry_10um_Neph3W_1)
  • Aerosol backwards-hemispheric light scattering coefficient, Ref. Humidograph
    nephelometer green chan(Bbs_G_Dry_1um_Neph3W_1)
  • Aerosol total light scattering coefficient, Ref. Humidograph nephelometer green
    channel, 1 um particle diameter(Bs_G_Dry_1um_Neph3W_1)
  • Aerosol backwards-hemispheric light scattering coefficient, reference
    nephelometer green channel, 10(Bbs_G_Dry_10um_Neph3W_1)
  • Aerosol total light scattering coefficient, reference nephelometer green
    channel, 10 um particle diameter(Bs_G_Dry_10um_Neph3W_1)
  • Aerosol backwards-hemispheric light scattering coefficient, reference
    nephelometer red channel, 1 um particle diameter(Bbs_R_Dry_1um_Neph3W_1)

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DQRID : D120608.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/01/2010154004/18/20112010Incorrect
Subject:
SGP/AOS/C1 - CPC leak
DataStreams:sgpnoaaaosC1.b1
Description:
There was a slow internal leak in the CPC instrument and the data slowly decreased over 
time. The CN concentration is a lower limit and is likely 5 to 20% lower than the actual 
value with higher errors toward the end of the DQR period. The problem was fixed by 
replacing the CPC saturator block.
Measurements:sgpnoaaaosC1.b1:
  • Condensation nuclei concentration number(N_CPC_1)

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