Data Quality Reports for Session: 108742 User: perths3 Completed: 11/05/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000203.2SGP/AOS/C1 - Humidograph water circulation system failuresgpaosC1.a0
D000203.3SGP/AOS/C1 - CN counter removedsgpaosC1.a0
D000801.3SGP/AOS/C1 - Nephelometer failuresgpaosC1.a0, sgpaosauxC1.a0
D000801.4SGP/AOS/C1 - Nephelometer failuresgpaosC1.a0, sgpaosauxC1.a0
D000801.5SGP/AOS/C1 - Nephelometer failuresgpaosC1.a0, sgpaosauxC1.a0
D980505.1SGP/AOS/C1 - Annual MaintenancesgpaosC1.a0
D980528.1SGP/AOS/C1 - Optical Particle Counter (PCASP-X) downsgpaosC1.a0, sgpaosauxC1.a0
D990611.1SGP/AOS/C1 - Ozone Instrument FailuresgpaosC1.a0, sgpaosauxC1.a0
D990614.1SGP/AOS/C1 - Invalid absorption datasgpaosC1.a0, sgpaosauxC1.a0
D990618.1SGP/AOS/C1 - Incorrect absorption and scattering datasgpaosC1.a0
D990809.1SGP/AOS/C1 - Ozone instrument errorsgpaosC1.a0, sgpaosauxC1.a0


DQRID : D000203.2
Start DateStart TimeEnd DateEnd Time
12/02/1999230001/15/20000000
Subject:
SGP/AOS/C1 - Humidograph water circulation system failure
DataStreams:sgpaosC1.a0
Description:
The water circulation system for the AOS humidograph failed.  Consequently, the humidified 
nephelometer was reporting aerosol light scattering values during this period that were 
close to what the reference nephelometer was observing. The difference between the two 
sets of measurements reflect particle losses in the humidifier and different temperature 
environments for the two instruments. Humidified nephelometer data during this period are 
technically valid, they just do not reflect relative humidity scans (the normal operating 
mode).
Measurements:sgpaosC1.a0:
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)

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DQRID : D000203.3
Start DateStart TimeEnd DateEnd Time
11/16/1999044801/15/20000000
07/08/2002113108/05/20021424
Subject:
SGP/AOS/C1 - CN counter removed
DataStreams:sgpaosC1.a0
Description:
The AOS condensation particle counter performance degraded to unacceptable
levels and was removed for repair.  

For the first time period: upon inspection of the internal condition of the instrument, it 
was found that oil was present in the intake line.  It is unknown how this oil could 
have arrived in this position.  The instrument was thoroughly cleaned and back-flushed, and 
returned to service during the maintenance visit.

For the second time period: The degradation of began July 8th.  Data collected during this 
time period are either incorrect or missing and should not be used.
Measurements:sgpaosC1.a0:
  • CPC Particle concentration(CPCPartConc)

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DQRID : D000801.3
Start DateStart TimeEnd DateEnd Time
06/02/2000184206/16/20002234
Subject:
SGP/AOS/C1 - Nephelometer failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer 
humidograph system during a Friday Preventative Maintenance.  This resulted in liquid 
water getting into the humidified nephelometer.  Flow was restored to the system on Monday, 
but the nephelometers were producing strange data.  A number of tests were performed 
over the next few days to remotely troubleshoot the situation, to no avail.  Eventually, the 
decision was made to pull both nephelometers and return them to Boulder for repair.  
This DQR refers only to the reference nephelometer, which was out of service for 2 periods 
due to 2 separate problems.  This DQR is for the first period, from 000602 (1842 GMT) to 
000616 (2234 GMT).  Light absorption are invalid whenever the reference nephelometer is 
not operational, because those data are required for correction of the absorption data.
Measurements:sgpaosauxC1.a0:
  • TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
  • TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
  • TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_LRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_LRH)
  • TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
  • TSI Low RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
  • TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
  • CLAP Signal(BapSignal)
  • CLAP reference signal(BapRef)
  • TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
sgpaosC1.a0:
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)

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DQRID : D000801.4
Start DateStart TimeEnd DateEnd Time
06/20/2000134007/03/20001833
Subject:
SGP/AOS/C1 - Nephelometer failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer 
humidograph system during a Friday Preventative Maintenance.  This resulted in liquid 
water getting into the humidified nephelometer.  Flow was restored to the system on Monday, 
but the nephelometers were producing strange data.  A number of tests were performed 
over the next few days to remotely troubleshoot the situation, to no avail.  Eventually, the 
decision was made to pull both nephelometers and return them to Boulder for repair.  
This DQR refers only to the reference nephelometer, which was out of service for 2 periods 
due to 2 separate problems.  This DQR is for the second period, from 000620 (1340 GMT) to 
000703 (1833 GMT).  Light absorption measurements are invalid whenever the reference 
nephelometer is not operational, because those data are required for correction of the 
absorption data.
Measurements:sgpaosauxC1.a0:
  • TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
  • TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
  • TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_LRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_LRH)
  • TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
  • TSI Low RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
  • TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
  • CLAP Signal(BapSignal)
  • CLAP reference signal(BapRef)
  • TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
sgpaosC1.a0:
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)

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DQRID : D000801.5
Start DateStart TimeEnd DateEnd Time
06/02/2000184207/03/20001833
Subject:
SGP/AOS/C1 - Nephelometer failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer 
humidograph system during a Friday Preventative Maintenance.  This resulted in liquid 
water getting into the humidified nephelometer.  Flow was restored to the system on Monday, 
but the nephelometers were producing strange data.  A number of tests were performed 
over the next few days to remotely troubleshoot the situation, to no avail.  Eventually, the 
decision was made to pull both nephelometers and return them to Boulder for repair.  
This DQR refers only to the humidified nephelometer, which was out of service for the entire 
period from 000602 through 000703.
Measurements:sgpaosauxC1.a0:
  • TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_HRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_HRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
  • TSI High RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
  • TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
  • TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
  • TSI High RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_HRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_HRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
  • TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
  • TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
  • CLAP Signal(BapSignal)
  • CLAP reference signal(BapRef)
sgpaosC1.a0:
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)

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DQRID : D980505.1
Start DateStart TimeEnd DateEnd Time
08/04/1997145908/08/19971348
04/20/1998144904/23/19982136
07/19/1999145207/30/19991829
01/10/2000140001/15/20000000
09/30/2002130010/04/20021900
03/17/2003154703/21/20032248
Subject:
SGP/AOS/C1  - Annual Maintenance
DataStreams:sgpaosC1.a0
Description:
The AOS Annual maintenance/calibration visit occurred during these periods.  During these 
times, instruments were cleaned, calibrated, and when necessary, repaired.  Instruments 
were online collecting data for some of the time; however, periods of contamination are 
probable because aerosol sampling lines were opened for inspection and cleaning and pumps 
were switched off for periods of time. Any data fields during this period that contain 
data should be considered incorrect.
Measurements:sgpaosC1.a0:
  • CPC Particle concentration(CPCPartConc)
  • PMS PCASP Chan. 7 (0.23 micrometers < Dp < 0.26)(pa23_p26conc)
  • PMS PCASP Chan. 26 (3.00 micrometers < Dp < 3.50)(pa300_p350conc)
  • Temperature in sample line down of heater(SampTemp)
  • PMS PCASP Chan. 15 (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
  • TSI High RH Neph. Pressure(TSINephPres_HRH)
  • TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
  • PMS PCASP Chan. 0 (Dp > 10 micrometers)(Pa1000Conc)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • PMS PCASP Chan. 2 (0.12 micrometers < Dp < 0.14)(pa12_p14conc)
  • 1 um Absorption coefficient(Bap_I_1um)
  • PMS PCASP Chan. 18 (1.00 micrometers < Dp < 1.30)(pa100_p130conc)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • PMS PCASP Chan. 23 1/cm^3 (2.00 micrometers < Dp < 2.30)(pa200_p230conc)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI Low RH Neph. relative humidity(TSINephRHSamp_LRH)
  • TSI Low RH Neph. inlet temperature(TSINephTin_LRH)
  • PMS PCASP Chan. 21 (1.60 micrometers < Dp < 1.80)(pa160_p180conc)
  • PMS PCASP Chan. 9 (0.30 micrometers < Dp < 0.35)(pa30_p35conc)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • PMS PCASP Chan. 27 (3.50 micrometers < Dp < 4.00)(pa350_p400conc)
  • PMS PCASP Chan. 13 (0.50 micrometers < Dp < 0.60)(pa50_p60conc)
  • TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. Pressure(TSINephPres_LRH)
  • PMS PCASP Chan. 5 (0.18 micrometers < Dp < 0.20)(pa18_p20conc)
  • PMS PCASP Chan. 10 (0.35 micrometers < Dp < 0.40)(pa35_p40conc)
  • PMS PCASP Chan. 11 (0.35 micrometers < Dp < 0.40)(pa40_p45conc)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
  • Ozone concentration(Ozone)
  • PMS PCASP Chan. 16 (0.80 micrometers < Dp < 0.90)(pa80_p90conc)
  • PMS PCASP Chan. 29 (5.00 micrometers < Dp < 6.50)(pa500_p650conc)
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • Temp. downstream of humidograph(HGdownstream_T)
  • TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
  • PMS PCASP Chan. 28 (4.00 micrometers < Dp < 5.00)(pa400_p500conc)
  • PMS PCASP Chan. 25 (2.60 micrometers < Dp < 3.00)(pa260_p300conc)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • Relative humidity in sample line down. of heater(SampRH)
  • B_sp, at 530 nm from single wave. neph.(Bscat530nm)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • Single wave Neph. pressure(Pres530nm)
  • RH upstream of humidograph(HGupstream_RH)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • PMS PCASP Chan. 6 (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
  • Temp. upstream of humidograph(HGupstream_T)
  • PMS PCASP Chan. 19 (1.30 micrometers < Dp < 1.40)(pa130_p140conc)
  • PMS PCASP Chan. 30 (6.50 micrometers < Dp < 8.00)(pa650_p800conc)
  • PMS PCASP Chan. 17 (0.90 micrometers < Dp < 1.00)(pa90_p100conc)
  • PMS PCASP Chan. 3 (0.14 micrometers < Dp < 0.16)(pa14_p16conc)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI High RH Neph. inlet temperature(TSINephTin_HRH)
  • PMS PCASP Chan. 31 (8.00 micrometers < Dp < 10.0)(pa800_p1000conc)
  • PMS PCASP Chan. 1 1/cm^3 (0.10 micrometers < Dp < 0.12)(pa10_p12conc)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • PMS PCASP Chan. 22 (1.80 micrometers < Dp < 2.00)(pa180_p200conc)
  • PMS PCASP Chan. 24 (2.30 micrometers < Dp < 2.60)(pa230_p260conc)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • PMS PCASP Chan. 4 (0.16 micrometers < Dp < 0.18)(pa16_p18conc)
  • PMS PCASP Chan. 20 (1.40 micrometers < Dp < 1.60)(pa140_p160conc)
  • PMS PCASP Chan. 8 (0.26 micrometers < Dp < 0.30)(pa26_p30conc)
  • RH downstream of humidograph(HGdownstream_RH)
  • PMS PCASP Chan. 14 (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)
  • Outdoor air temperature(AmbTemp)
  • Single wave Neph. RH(RH530nm)
  • Radiance neph. temperature(Neph530Temp)
  • PMS PCASP Chan. 12 (0.45 micrometers < Dp < 0.50)(pa45_p50conc)

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DQRID : D980528.1
Start DateStart TimeEnd DateEnd Time
07/01/1997093607/03/19971556
08/01/1997132908/08/19971348
05/05/1998092606/16/19981505
06/09/1999082407/26/19992205
09/08/2000042610/13/20001630
05/17/2002060205/20/20051847
05/23/2002201105/31/20021258
09/09/2002000010/07/20021905
Subject:
SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
The AOS Optical Particle Spectrometer (PCASP-X sizing probe) was down during these 
periods.  This lowers the laser reference voltage and results in inaccurate sizing.
Measurements:sgpaosauxC1.a0:
  • OPC sheath(OPCSheath)
  • OPC sample flow(OPCFlow)
  • Analog signal from PMS PCASP(OPCLaserVolt)
sgpaosC1.a0:
  • PMS PCASP Chan. 7 (0.23 micrometers < Dp < 0.26)(pa23_p26conc)
  • PMS PCASP Chan. 26 (3.00 micrometers < Dp < 3.50)(pa300_p350conc)
  • PMS PCASP Chan. 28 (4.00 micrometers < Dp < 5.00)(pa400_p500conc)
  • PMS PCASP Chan. 15 (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
  • PMS PCASP Chan. 25 (2.60 micrometers < Dp < 3.00)(pa260_p300conc)
  • PMS PCASP Chan. 0 (Dp > 10 micrometers)(Pa1000Conc)
  • PMS PCASP Chan. 2 (0.12 micrometers < Dp < 0.14)(pa12_p14conc)
  • PMS PCASP Chan. 30 (6.50 micrometers < Dp < 8.00)(pa650_p800conc)
  • PMS PCASP Chan. 6 (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
  • 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. 18 (1.00 micrometers < Dp < 1.30)(pa100_p130conc)
  • PMS PCASP Chan. 3 (0.14 micrometers < Dp < 0.16)(pa14_p16conc)
  • PMS PCASP Chan. 31 (8.00 micrometers < Dp < 10.0)(pa800_p1000conc)
  • 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)
  • PMS PCASP Chan. 21 (1.60 micrometers < Dp < 1.80)(pa160_p180conc)
  • PMS PCASP Chan. 22 (1.80 micrometers < Dp < 2.00)(pa180_p200conc)
  • PMS PCASP Chan. 9 (0.30 micrometers < Dp < 0.35)(pa30_p35conc)
  • PMS PCASP Chan. 27 (3.50 micrometers < Dp < 4.00)(pa350_p400conc)
  • PMS PCASP Chan. 13 (0.50 micrometers < Dp < 0.60)(pa50_p60conc)
  • PMS PCASP Chan. 4 (0.16 micrometers < Dp < 0.18)(pa16_p18conc)
  • PMS PCASP Chan. 20 (1.40 micrometers < Dp < 1.60)(pa140_p160conc)
  • PMS PCASP Chan. 8 (0.26 micrometers < Dp < 0.30)(pa26_p30conc)
  • PMS PCASP Chan. 5 (0.18 micrometers < Dp < 0.20)(pa18_p20conc)
  • PMS PCASP Chan. 14 (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
  • PMS PCASP Chan. 10 (0.35 micrometers < Dp < 0.40)(pa35_p40conc)
  • PMS PCASP Chan. 11 (0.35 micrometers < Dp < 0.40)(pa40_p45conc)
  • PMS PCASP Chan. 16 (0.80 micrometers < Dp < 0.90)(pa80_p90conc)
  • PMS PCASP Chan. 12 (0.45 micrometers < Dp < 0.50)(pa45_p50conc)
  • PMS PCASP Chan. 29 (5.00 micrometers < Dp < 6.50)(pa500_p650conc)

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DQRID : D990611.1
Start DateStart TimeEnd DateEnd Time
05/07/1999155605/14/19991445
Subject:
SGP/AOS/C1 - Ozone Instrument Failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
A malfunction occurred with the AOS surface ozone instrument during the period 990507 1556 
GMT to 990514 1445 GMT.  The instrument reported an ozone concentration of 9.91e-01 ppm 
(991 ppb) continuously during this time.  Quality checking of the data the following week 
revealed that the problem began at about the time weekly maintenance check was made on 
Friday.  The problem continued until the next weekly maintenance check was done.  Site Ops 
was notified by the mentor of the problem on Friday, 5/14/99, and a technician was sent 
to inspect the system.  No switches on the instrument front panel were found in the wrong 
position (for example, if the instrument was inadvertantly left in a calibration mode).  
By the time the technician arrived at the trailer, the instrument appeared to be working 
correctly.  No explanation is given as to why these erroneous values were being 
generated by the ozone instrument, except that possibly it locked up with the throwing of the 
weekly preventative maintenance switch and this problem was not corrected until the same 
switch was thrown the following week.
Measurements:sgpaosauxC1.a0:
  • Ozone sample frequency(O3_Samp)
  • Ozone offset value(O3_Offset)
  • Ozone sample pressure(O3_Press)
  • Ozone span value(O3_Span)
  • Ozone line temp. from thermocouple attached to heater(O3_LinHeater)
  • Ozone sample temperature(O3_Temp)
  • Ozone line temperature set point(O3_SetPt)
  • Ozone span concentration(O3_Spn)
  • Ozone zero concentration(O3_Zro)
  • Ozone line sample temperature (omega temp. sensor)(O3_LinTemp)
  • unknown(O3_Cont)
  • Ozone mode(O3_Mode)
sgpaosC1.a0:
  • Ozone concentration(Ozone)

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DQRID : D990614.1
Start DateStart TimeEnd DateEnd Time
05/21/1999141305/27/19991819
Subject:
SGP/AOS/C1 - Invalid absorption data
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
During the period noted, a valve position error with the 1-um/10-um impactor switching 
valve occurred.  The result of this error was to invalidate all switched data.  The software 
correctly inserted missing value codes in the nephelometer data, but the PSAP light 
absorption photometer for some reason reported a constant value over this period.
Measurements:sgpaosauxC1.a0:
  • Transmittance through CLAP filter(BapFiltr)
  • CLAP Signal(BapSignal)
  • CLAP reference signal(BapRef)
  • CLAP flow(BapFlow)
sgpaosC1.a0:
  • 10 um Absorption coefficient(Bap_I_10um)
  • 1 um Absorption coefficient(Bap_I_1um)

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DQRID : D990618.1
Start DateStart TimeEnd DateEnd Time
05/21/1999134805/27/19991822
Subject:
SGP/AOS/C1 - Incorrect absorption and scattering data
DataStreams:sgpaosC1.a0
Description:
The electronically switched valve that alternately switches flow through 1-um and 10-um 
impactors showed an error during this time period.  This error invalidated all downstream 
data.  In the raw data files, aerosol light scattering coefficients for the TSI reference 
and humidified nephelometers were assigned missing value codes.  The aerosol light 
absorption coefficient was observed to stick at a constant value over this period.  The problem 
went away after the weekly maintenance was performed, although nothing specific was done 
to the valve.  The flipping of the maintenance switch appears to have solved the problem.
Measurements:sgpaosC1.a0:
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)

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DQRID : D990809.1
Start DateStart TimeEnd DateEnd Time
06/18/1999162806/22/19991537
06/25/1999163006/28/19991343
Subject:
SGP/AOS/C1 - Ozone instrument error
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
A switch on the front panel of the ozone instrument was left in the wrong position.  This 
resulted in a bad value for ozone concentration being logged for these periods.
Measurements:sgpaosauxC1.a0:
  • Ozone sample frequency(O3_Samp)
  • Ozone offset value(O3_Offset)
  • Ozone sample pressure(O3_Press)
  • Ozone span value(O3_Span)
  • Ozone line temp. from thermocouple attached to heater(O3_LinHeater)
  • Ozone sample temperature(O3_Temp)
  • Ozone line temperature set point(O3_SetPt)
  • Ozone span concentration(O3_Spn)
  • Ozone zero concentration(O3_Zro)
  • Ozone line sample temperature (omega temp. sensor)(O3_LinTemp)
  • unknown(O3_Cont)
  • Ozone mode(O3_Mode)
sgpaosC1.a0:
  • Ozone concentration(Ozone)

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