Data Quality Reports for Session: 184377 User: tongs1 Completed: 03/20/2017

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D100129.1GRW/AOS/M1 - CPC TEC failuregrwaosM1.a1Missing
D101020.2GRW/AOS/M1 - Data processing problemgrwaosM1.a1Does not affect quality
D120820.1GRW/AOS/M1 - CPC undercountinggrwaosM1.a1Incorrect


DQRID : D100129.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/19/2009184401/15/20101820Missing
Subject:
GRW/AOS/M1 - CPC TEC failure
DataStreams:grwaosM1.a1
Description:
The thermal electric cooler, which controls the temperature in the Condensation Particle 
Counter, failed. A new TEC was mailed to GRW. The TEC was replaced and the CPC was working 
again on Jan. 15th, 2010.
Measurements:grwaosM1.a1:
  • Condensation nuclei concentration number(N_CPC_1)

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DQRID : D101020.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/15/2009000012/31/20090000Does not affect quality
Subject:
GRW/AOS/M1 - Data processing problem
DataStreams:grwaosM1.a1
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: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 red, corrected for flow and sample area, 3 wavelength
    PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
  • Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 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 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, 1 um size cut(Ba_R_Dry_1um_PSAP3W_1)
  • Absorption coefficient, green wavelength, low RH, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
  • Absorption coefficient, green wavelength, low RH, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)

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DQRID : D120820.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/27/2009000009/08/20090825Incorrect
Subject:
GRW/AOS/M1 - CPC undercounting
DataStreams:grwaosM1.a1
Description:
The CPC was undercounting by about 10-20 percent relative to the CCN. After cleaning the 
CPC and replacing the butanol, the signal increased to above that of the CCN.

Increase CPC signal so that it equals the CCN signal at the maximum SS value. The 
corrected signal will represent relative and not an absolute particle concentration.
Measurements:grwaosM1.a1:
  • Condensation nuclei concentration number(N_CPC_1)

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