DQRID : D980526.1
Start DateStart TimeEnd DateEnd Time
11/03/1995000005/26/19981910
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Subject:
SGP/AOS/C1  - PSAP Flow Rate Change
DataStreams:sgpaosC1.a0
Description:
The AOS PSAP flow rate was reduce due to data becoming noisy at the end of each weekend, 
probably due to the decrease in the dynamic range of the instrument experienced when the 
filter is heavily loaded.

The flow rate of the PSAP was decreased from its previous nominal value of 0.90 standard 
liters per minute to 0.75 standard liters per minute on 5/26/98 at 1910 GMT.  This should 
lessen the aerosol deposit buildup at the end of the weekends
Suggestions: 
Measurements:sgpaosC1.a0:  
  • TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • PMS PCASP Chan. 31  (8.00 micrometers < Dp < 10.0)(pa800_p1000conc)
  • TSI High RH Neph. inlet temperature(TSINephTin_HRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. relative humidity(TSINephRHSamp_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • RH upstream of humidograph(HGupstream_RH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • TSI Low RH Neph. inlet temperature(TSINephTin_LRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
  • PMS PCASP Chan. 3  (0.14 micrometers < Dp < 0.16)(pa14_p16conc)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • Temp. downstream of humidograph(HGdownstream_T)
  • PMS PCASP Chan. 9  (0.30 micrometers < Dp < 0.35)(pa30_p35conc)
  • TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
  • Temperature in sample line down of heater(SampTemp)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • RH downstream of humidograph(HGdownstream_RH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • PMS PCASP Chan. 2  (0.12 micrometers < Dp < 0.14)(pa12_p14conc)
  • PMS PCASP Chan. 20  (1.40 micrometers < Dp < 1.60)(pa140_p160conc)
  • PMS PCASP Chan. 28  (4.00 micrometers < Dp < 5.00)(pa400_p500conc)
  • CPC Particle concentration(CPCPartConc)
  • PMS PCASP Chan. 16  (0.80 micrometers < Dp < 0.90)(pa80_p90conc)
  • PMS PCASP Chan. 14  (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
  • PMS PCASP Chan. 5  (0.18 micrometers < Dp < 0.20)(pa18_p20conc)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • PMS PCASP Chan. 22  (1.80 micrometers < Dp < 2.00)(pa180_p200conc)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • PMS PCASP Chan. 19  (1.30 micrometers < Dp < 1.40)(pa130_p140conc)
  • PMS PCASP Chan. 17  (0.90 micrometers < Dp < 1.00)(pa90_p100conc)
  • PMS PCASP Chan. 10  (0.35 micrometers < Dp < 0.40)(pa35_p40conc)
  • PMS PCASP Chan. 8  (0.26 micrometers < Dp < 0.30)(pa26_p30conc)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • PMS PCASP Chan. 4  (0.16 micrometers < Dp < 0.18)(pa16_p18conc)
  • 10 um Absorption coefficient(Bap_I_10um)
  • PMS PCASP Chan. 25  (2.60 micrometers < Dp < 3.00)(pa260_p300conc)
  • PMS PCASP Chan. 29  (5.00 micrometers < Dp < 6.50)(pa500_p650conc)
  • Temp. upstream of humidograph(HGupstream_T)
  • Single wave Neph. RH(RH530nm)
  • PMS PCASP Chan. 0 (Dp > 10 micrometers)(Pa1000Conc)
  • PMS PCASP Chan. 1 1/cm^3 (0.10 micrometers < Dp < 0.12)(pa10_p12conc)
  • PMS PCASP Chan. 23 1/cm^3 (2.00 micrometers < Dp < 2.30)(pa200_p230conc)
  • PMS PCASP Chan. 24  (2.30 micrometers < Dp < 2.60)(pa230_p260conc)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • Ozone concentration(Ozone)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • TSI High RH Neph. Pressure(TSINephPres_HRH)
  • TSI Low RH Neph. Pressure(TSINephPres_LRH)
  • Single wave Neph. pressure(Pres530nm)
  • PMS PCASP Chan. 30  (6.50 micrometers < Dp < 8.00)(pa650_p800conc)
  • Relative humidity in sample line down. of heater(SampRH)
  • PMS PCASP Chan. 26  (3.00 micrometers < Dp < 3.50)(pa300_p350conc)
  • PMS PCASP Chan. 13  (0.50 micrometers < Dp < 0.60)(pa50_p60conc)
  • B_sp, at 530 nm from single wave. neph.(Bscat530nm)
  • PMS PCASP Chan. 27  (3.50 micrometers < Dp < 4.00)(pa350_p400conc)
  • PMS PCASP Chan. 11  (0.35 micrometers < Dp < 0.40)(pa40_p45conc)
  • PMS PCASP Chan. 15  (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
  • PMS PCASP Chan. 21  (1.60 micrometers < Dp < 1.80)(pa160_p180conc)
  • Radiance neph. temperature(Neph530Temp)
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • Outdoor air temperature(AmbTemp)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • PMS PCASP Chan. 18  (1.00 micrometers < Dp < 1.30)(pa100_p130conc)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • PMS PCASP Chan. 6  (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • PMS PCASP Chan. 7  (0.23 micrometers < Dp < 0.26)(pa23_p26conc)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)
  • PMS PCASP Chan. 12  (0.45 micrometers < Dp < 0.50)(pa45_p50conc)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
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