DQRs for Session: 149208 User:jeffersonCompleted: 04-03-2013

Data Quality Reports for Session: 149208 User: jefferson Completed: 04/03/2013

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D101020.2	GRW/AOS/M1 - Data processing problem	grwaosM1.a1, grwnoaaaosM1.b1, grwnoaaaosavgM1.b1
D120820.1	GRW/AOS/M1 - CPC undercounting	grwaosM1.a1, grwnoaaaosM1.b1, grwnoaaaosavgM1.b1

DQRID : D101020.2

Start Date	Start Time	End Date	End Time
04/15/2009	0000	12/31/2009	0000

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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DQRID : D120820.1

Start Date	Start Time	End Date	End Time
04/27/2009	0000	09/08/2009	0825

Subject:	GRW/AOS/M1 - CPC undercounting
DataStreams:	grwaosM1.a1, grwnoaaaosM1.b1, grwnoaaaosavgM1.b1
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:	grwnoaaaosavgM1.b1: Condensation Nuclei Concentration Number(N_CPC_1) grwaosM1.a1: Condensation Nuclei Concentration Number(N_CPC_1) grwnoaaaosM1.b1: Condensation Nuclei Concentration Number(N_CPC_1)

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