D Q R Report

DQRID : D150306.2

Start Date	Start Time	End Date	End Time
06/11/2013	1926	04/08/2015	1730

Subject:	SGP/CCN/C1 - Instrument under counting at lowest super saturation value
DataStreams:	sgpaosccn100C1.a1, sgpaosccnavgC1.c1, sgpaosccnavgC1.c2, sgpaosccnC1.a1, sgpaosccnC1.00
Description:	The slow temperature decay of the OPC induced droplet evaporation and caused an under counting of the droplets at the lowest %ss, 0.15.
Suggestions:	Use next highest %ss value, 0.25
Measurements:	sgpaosccnC1.a1: AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set) AOS CCN sample supersaturation calculated by model)(CCN_ss_calc) more sgpaosccnC1.00: (Raw data stream - documentation not supported) more sgpaosccn100C1.a1: AOS CCN super saturation (calculated)(CCN_super_saturation_calculated) AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set) more sgpaosccnavgC1.c2: Sample supersaturation calculated via Lance/Rose method(supersaturation_calculated) Supersaturation set point(supersaturation_setpoint) more sgpaosccnavgC1.c1: Supersaturation set point(supersaturation_setpoint) Sample supersaturation calculated via Lance/Rose method(supersaturation_calculated) more