Data Quality Reports for Session: 141139 User: chiuj Completed: 03/12/2012

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D100715.3GRW/AOS/M1 - CCN Detector misalignmentgrwaosccnM1.a1
D101020.2GRW/AOS/M1 - Data processing problemgrwaosM1.a1, grwnoaaaosM1.b1, grwnoaaaosavgM1.b1


DQRID : D100715.3
Start DateStart TimeEnd DateEnd Time
06/02/2010180007/13/20101600
Subject:
GRW/AOS/M1 - CCN Detector misalignment
DataStreams:grwaosccnM1.a1
Description:
The CCN signal was unusually low about 100 particles/cc. The %SS growth curves were 
asymmetrical. Upon consultation with the manufacturer, DMT, it was predicted that the OPC 
detector was clogged or misaligned. I had the tech, Carlos, remove the detector and ship it 
back to Boulder. The detector was cleaned. An o-ring for a lens wasn't properly seated. The 
OPC was sent back to GRW and installed. Data looks normal after the reinstallation on 
July 13th.
Measurements:grwaosccnM1.a1:
  • AOS number concentration of CCN(N_CCN)
  • AOS CCN number concentration by bin(N_CCN_dN)
  • AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)

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DQRID : D101020.2
Start DateStart TimeEnd DateEnd Time
04/15/2009000012/31/20090000
Subject:
GRW/AOS/M1 - Data processing problem
DataStreams:grwaosM1.a1, grwnoaaaosM1.b1, grwnoaaaosavgM1.b1
Description:
The AOS data was reprocessed for the AMF, SGP and NSA sites. There was an error in the 
processing of the corrections for the PSAP absorption signal such that a low pass filter was 
implemented for the scattering data used in these corrections.The difference between the 
corrected and previous data is < 0.05 Mm-1 (below the instrument detection limit) and 
should not have a significant effect on the previous data. Data will be reprocessed at a 
later time when more significant changes to the data processing are implemented.
Measurements:grwnoaaaosavgM1.b1:
  • Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
  • Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
grwaosM1.a1:
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
  • Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
  • Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
grwnoaaaosM1.b1:
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
  • Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
  • Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
  • Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
    PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
  • Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
  • Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)

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