DQR ID | Subject | Data Streams Affected |
---|
D000203.2 | SGP/AOS/C1 - Humidograph water circulation system failure | sgpaosC1.a0 |
D000203.3 | SGP/AOS/C1 - CN counter removed | sgpaosC1.a0 |
D000801.3 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D000801.4 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D000801.5 | SGP/AOS/C1 - Nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D020709.3 | SGP/AOS/C1 - AOS Computer Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D021007.1 | SGP/AOS/C1 - Ozone instrument out of service | sgpaosC1.a0, sgpaosauxC1.a0 |
D030210.1 | SGP/AOS/C1 - Data missing | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0 |
D040130.1 | SGP/AOS/C1 - Ozone Instrument removed for repair | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.3 | SGP/AOS/C1 - PCASP instrument problem | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.4 | SGP/AOS/C1 - Ozone instrument removed for repair | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.5 | SGP/AOS/C1 - Condensation Particle Counter failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D041026.6 | SGP/AOS/C1 - Wet nephelometer problems | sgpaosC1.a0, sgpaosauxC1.a0 |
D050120.2 | SGP/AOS/C1 - Failed RH sensor | sgpaosC1.a0 |
D980505.1 | SGP/AOS/C1 - Annual Maintenance | sgpaosC1.a0 |
D980513.1 | SGP/AOS/C1 - Single wavelength nephelometer pump failure | sgpaosC1.a0 |
D980526.1 | SGP/AOS/C1 - PSAP Flow Rate Change | sgpaosC1.a0 |
D980527.2 | SGP/AOS/C1 - Single-wavelength nephelometer errors | sgpaosC1.a0 |
D980527.3 | SGP/AOS/C1 - 3-wavelength nephelometer failure | sgpaosC1.a0 |
D980527.4 | SGP/AOS/C1 - Condensation Particle Counter failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.1 | SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.10 | SGP/AOS/C1 - Instrument communications problems | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.2 | SGP/AOS/C1 - 3-wavelength nephelometer data missing | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.6 | SGP/AOS/C1 - Ozone instrument left in span mode | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.7 | SGP/AOS/C1 - Line 8 bypass in wrong position | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.8 | SGP/AOS/C1 - Light absorption photometer (PSAP) error | sgpaosC1.a0, sgpaosauxC1.a0 |
D980528.9 | SGP/AOS/C1 - Ozone Instrument Communication Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D980529.1 | SGP/AOS/C1 - Ozone Instrument data incorrect | sgpaosC1.a0, sgpaosauxC1.a0 |
D980731.1 | SGP/AOS/C1 - Aerosol sampling system and nephelometer failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D981203.1 | SGP/AOS/C1 - 3-wavelength nephelometer data missing | sgpaosC1.a0, sgpaosauxC1.a0 |
D981223.2 | SGP/AOS/C1 - Intermittent leak in AOS spare sampling line and thermal sensitivity | sgpaosC1.a0 |
D990611.1 | SGP/AOS/C1 - Ozone Instrument Failure | sgpaosC1.a0, sgpaosauxC1.a0 |
D990614.1 | SGP/AOS/C1 - Invalid absorption data | sgpaosC1.a0, sgpaosauxC1.a0 |
D990618.1 | SGP/AOS/C1 - Incorrect absorption and scattering data | sgpaosC1.a0 |
D990809.1 | SGP/AOS/C1 - Ozone instrument error | sgpaosC1.a0, sgpaosauxC1.a0 |
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: - total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 1 um Absorption coefficient(Bap_I_1um)
- 10 um Absorption coefficient(Bap_I_10um)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(RedBScatCoef_10um_LRH)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(RedTScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
|
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: - total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 1 um Absorption coefficient(Bap_I_1um)
- 10 um Absorption coefficient(Bap_I_10um)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(RedBScatCoef_10um_LRH)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(RedTScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
|
Subject: | SGP/AOS/C1 - AOS Computer Failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The AOS computer started to experience periodic failures caused by an aging and failing
system disk. Replacement of the AOS computer's system disk occurred between 2-4 June 2002. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- Radiance neph zero scattering coefficient(Zero530nm)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- Pressure difference across TSI neph.(Line8DeltaP)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- unknown(O3_Cont)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- Relative humidity in main sample manifold heater(Line11RH)
- altitude above sea levelaltunits(alt)
- Ozone offset value(O3_Offset)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- TSI High RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_HRH)
- Ozone sample pressure(O3_Press)
- CLAP flow(BapFlow)
- Main Sample manifold temperature(Line11Temp)
- Room temperature(RoomTemp)
- Ozone span concentration(O3_Spn)
- Flowrate of zero air line 2(ZeroAirFlow)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI neph. rack temperature(CabinetTemp)
- Pressure transducer V for line 3 (extra line)(Line3Vac)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- TSI High RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_HRH)
- Pressure transducer V for line 4 (extra line)(Line4Vac)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- OPC sample flow(OPCFlow)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_LRH)
- TSI CPC saturator temperature(CPCSaturT)
- TSI Low RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_LRH)
- TSI Low RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- Analog signal from PMS PCASP(OPCLaserVolt)
- Pressure difference across radiance neph.(Line6DeltaP)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
- Ozone line sample temperature (omega temp. sensor)(O3_LinTemp)
- Temperature in main sample manifold heater(Line11Heater)
- CLAP reference signal(BapRef)
- Mass flow output from line 8 (neph. 2 line)(Line8Flow)
- Transmittance through CLAP filter(BapFiltr)
- Temperature in back of Whatlow(WatAmbT)
- OPC sheath(OPCSheath)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- Ozone zero concentration(O3_Zro)
- Reference object brightness(Calib530nm)
- north latitude for all the input platforms.(lat)
- Ozone sample frequency(O3_Samp)
- Time offset of tweaks from base_time(time_offset)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- Pressure transducer V for line 6 (neph. 1 line)(Line6Vac)
- TSI High RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_HRH)
- Time offset from midnight of date of file. For CO data, this is identical to
time_offset and is included for compatibility.(time) - TSI Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- Ozone line temp. from thermocouple attached to heater(O3_LinHeater)
- Main stack air flow(MainAirFlow)
- TSI CPC condensor temperature(CPCCondT)
- Temperature between racks 0 and 1(Cab_4_5_Temp)
- 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)
- Ozone span value(O3_Span)
- Pressure transducer V for line 5 (extra line)(Line5Vac)
- TSI CPC condensor and saturator temperature difference(CPCDeltT)
- TSI High RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- Ozone line temperature set point(O3_SetPt)
- Temperature of line 8 air (neph. 2 line)(Line8Temp)
- Time offset from base_time(base_time)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- Ozone sample temperature(O3_Temp)
- TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
- CLAP Signal(BapSignal)
- east longitude for all the input platforms.(lon)
- Ozone mode(O3_Mode)
sgpaosC1.a0: - CPC Particle concentration(CPCPartConc)
- north latitude for all the input platforms.(lat)
- 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. 0 (Dp > 10 micrometers)(Pa1000Conc)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(RedBScatCoef_10um_LRH)
- east longitude for all the input platforms.(lon)
- Time offset from base_time(base_time)
- PMS PCASP Chan. 23 1/cm^3 (2.00 micrometers < Dp < 2.30)(pa200_p230conc)
- TSI Low RH Neph. relative humidity(TSINephRHSamp_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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- Time offset of tweaks from base_time(time_offset)
- PMS PCASP Chan. 5 (0.18 micrometers < Dp < 0.20)(pa18_p20conc)
- PMS PCASP Chan. 10 (0.35 micrometers < Dp < 0.40)(pa35_p40conc)
- 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)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- Single wave Neph. pressure(Pres530nm)
- RH upstream of humidograph(HGupstream_RH)
- 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 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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- PMS PCASP Chan. 20 (1.40 micrometers < Dp < 1.60)(pa140_p160conc)
- PMS PCASP Chan. 14 (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- Outdoor air temperature(AmbTemp)
- Radiance neph. temperature(Neph530Temp)
- TSI High RH Neph. Pressure(TSINephPres_HRH)
- PMS PCASP Chan. 15 (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(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 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)
- altitude above sea levelaltunits(alt)
- 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 Low RH Neph. inlet temperature(TSINephTin_LRH)
- PMS PCASP Chan. 11 (0.35 micrometers < Dp < 0.40)(pa40_p45conc)
- PMS PCASP Chan. 29 (5.00 micrometers < Dp < 6.50)(pa500_p650conc)
- Temp. downstream of humidograph(HGdownstream_T)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- Time offset from midnight of date of file. For CO data, this is identical to
time_offset and is included for compatibility.(time) - PMS PCASP Chan. 28 (4.00 micrometers < Dp < 5.00)(pa400_p500conc)
- PMS PCASP Chan. 25 (2.60 micrometers < Dp < 3.00)(pa260_p300conc)
- Relative humidity in sample line down. of heater(SampRH)
- B_sp, at 530 nm from single wave. neph.(Bscat530nm)
- 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)
- Temp. upstream of humidograph(HGupstream_T)
- PMS PCASP Chan. 6 (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
- PMS PCASP Chan. 19 (1.30 micrometers < Dp < 1.40)(pa130_p140conc)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(RedTScatCoef_1um_LRH)
- 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)
- PMS PCASP Chan. 4 (0.16 micrometers < Dp < 0.18)(pa16_p18conc)
- PMS PCASP Chan. 8 (0.26 micrometers < Dp < 0.30)(pa26_p30conc)
- RH downstream of humidograph(HGdownstream_RH)
- Single wave Neph. RH(RH530nm)
- PMS PCASP Chan. 12 (0.45 micrometers < Dp < 0.50)(pa45_p50conc)
|
Subject: | SGP/AOS/C1 - Ozone instrument out of service |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The ice storm of 30-31 January, 2002 shut down the AOS for ~2 weeks. A controlled
power-up of the system found a problem with the ozone monitor. Smoke was observed to come from
the ozone instrument, at which time it was shut down.
The ozone monitor was removed from the AOS for remote troubleshooting. The cause of the
smoke was identified as being from underneath a printed circuit board. At that point, Site
Ops staff were requested to send the unit to Boulder for additional troubleshooting.
NOAA staff received the unit on 20 February 2002.
After a brief inspection, the cause of the smoking was discovered. A one-half inch hole
was burned completely through the motherboard. The determination was made that this could
not be repaired at the NOAA facility, and a purchase order was initiated to return the
unit to Dasibi, Inc. (the manufacturer), for repair/replacement of the motherboard.
On 4 March, 2002, NOAA personnel received the OK from ARM to return the instrument to
Dasibi, Inc. for service. Dasibi, Inc., received the unit on or around 8 March, 2002. The
manufacturer was to test the unit, repair or replace the damaged motherboard, and
calibrate the unit according to the NIST standard protocol.
On 8 May, 2002, NOAA personnel emailed SGP Site Ops personnel and asked them to check on
the status of the repair, which was taking longer then expected. Upon trying to contact
the manufacturer, it was discovered that they went out of business. The return of
instruments from the manufacturer to customers was being handled by a contract company. The
ozone monitor arrived back in Boulder, in an unrepaired state, on or about 1 July 2002.
Since there were few other options, NOAA personnel undertook the difficult task of
repairing the motherboard. This required the re-routing of several electrical conduits from the
burned area in the multilayer board to other acceptable places on the board. This took
a considerable amount of electronics technician time and effort. After the motherboard
was repaired, extensive testing was required to verify that the repair was done
successfully and that other problems were not caused in the unit by the board burning..
The repair was deemed successful on 24 September, 2002. The unit was shipped back to the
SGP site immediately thereafter. It was installed during a NOAA AOS maintenance visit on
1 October, 2002. |
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)
|
Subject: | SGP/AOS/C1 - Data missing |
DataStreams: | sgpaosC1.00, sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The UPS supplying power to the AOS computer failed on Friday, 12/27/2002. The UPS was
repaired on Monday 12/30/2002, but the AOS computer was locked up and would not reboot.
Telephone communication was established with Richard Eagan, ANL, who was able to do a remote
reboot of the computer using his account. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- Radiance neph zero scattering coefficient(Zero530nm)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- Pressure difference across TSI neph.(Line8DeltaP)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- unknown(O3_Cont)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- Relative humidity in main sample manifold heater(Line11RH)
- altitude above sea levelaltunits(alt)
- Ozone offset value(O3_Offset)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- TSI High RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_HRH)
- Ozone sample pressure(O3_Press)
- CLAP flow(BapFlow)
- Main Sample manifold temperature(Line11Temp)
- Room temperature(RoomTemp)
- Ozone span concentration(O3_Spn)
- Flowrate of zero air line 2(ZeroAirFlow)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI neph. rack temperature(CabinetTemp)
- Pressure transducer V for line 3 (extra line)(Line3Vac)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- TSI High RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_HRH)
- Pressure transducer V for line 4 (extra line)(Line4Vac)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- OPC sample flow(OPCFlow)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_LRH)
- TSI CPC saturator temperature(CPCSaturT)
- TSI Low RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_LRH)
- TSI Low RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- Analog signal from PMS PCASP(OPCLaserVolt)
- Pressure difference across radiance neph.(Line6DeltaP)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
- Ozone line sample temperature (omega temp. sensor)(O3_LinTemp)
- Temperature in main sample manifold heater(Line11Heater)
- CLAP reference signal(BapRef)
- Mass flow output from line 8 (neph. 2 line)(Line8Flow)
- Transmittance through CLAP filter(BapFiltr)
- Temperature in back of Whatlow(WatAmbT)
- OPC sheath(OPCSheath)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- Ozone zero concentration(O3_Zro)
- Reference object brightness(Calib530nm)
- north latitude for all the input platforms.(lat)
- Ozone sample frequency(O3_Samp)
- Time offset of tweaks from base_time(time_offset)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- Pressure transducer V for line 6 (neph. 1 line)(Line6Vac)
- TSI High RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_HRH)
- Time offset from midnight of date of file. For CO data, this is identical to
time_offset and is included for compatibility.(time) - TSI Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- Ozone line temp. from thermocouple attached to heater(O3_LinHeater)
- Main stack air flow(MainAirFlow)
- TSI CPC condensor temperature(CPCCondT)
- Temperature between racks 0 and 1(Cab_4_5_Temp)
- 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)
- Ozone span value(O3_Span)
- Pressure transducer V for line 5 (extra line)(Line5Vac)
- TSI CPC condensor and saturator temperature difference(CPCDeltT)
- TSI High RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- Ozone line temperature set point(O3_SetPt)
- Temperature of line 8 air (neph. 2 line)(Line8Temp)
- Time offset from base_time(base_time)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- Ozone sample temperature(O3_Temp)
- TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
- CLAP Signal(BapSignal)
- east longitude for all the input platforms.(lon)
- Ozone mode(O3_Mode)
sgpaosC1.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpaosC1.a0: - CPC Particle concentration(CPCPartConc)
- north latitude for all the input platforms.(lat)
- 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. 0 (Dp > 10 micrometers)(Pa1000Conc)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(RedBScatCoef_10um_LRH)
- east longitude for all the input platforms.(lon)
- Time offset from base_time(base_time)
- PMS PCASP Chan. 23 1/cm^3 (2.00 micrometers < Dp < 2.30)(pa200_p230conc)
- TSI Low RH Neph. relative humidity(TSINephRHSamp_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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- Time offset of tweaks from base_time(time_offset)
- PMS PCASP Chan. 5 (0.18 micrometers < Dp < 0.20)(pa18_p20conc)
- PMS PCASP Chan. 10 (0.35 micrometers < Dp < 0.40)(pa35_p40conc)
- 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)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- Single wave Neph. pressure(Pres530nm)
- RH upstream of humidograph(HGupstream_RH)
- 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 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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- PMS PCASP Chan. 20 (1.40 micrometers < Dp < 1.60)(pa140_p160conc)
- PMS PCASP Chan. 14 (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- Outdoor air temperature(AmbTemp)
- Radiance neph. temperature(Neph530Temp)
- TSI High RH Neph. Pressure(TSINephPres_HRH)
- PMS PCASP Chan. 15 (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(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 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)
- altitude above sea levelaltunits(alt)
- 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 Low RH Neph. inlet temperature(TSINephTin_LRH)
- PMS PCASP Chan. 11 (0.35 micrometers < Dp < 0.40)(pa40_p45conc)
- PMS PCASP Chan. 29 (5.00 micrometers < Dp < 6.50)(pa500_p650conc)
- Temp. downstream of humidograph(HGdownstream_T)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- Time offset from midnight of date of file. For CO data, this is identical to
time_offset and is included for compatibility.(time) - PMS PCASP Chan. 28 (4.00 micrometers < Dp < 5.00)(pa400_p500conc)
- PMS PCASP Chan. 25 (2.60 micrometers < Dp < 3.00)(pa260_p300conc)
- Relative humidity in sample line down. of heater(SampRH)
- B_sp, at 530 nm from single wave. neph.(Bscat530nm)
- 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)
- Temp. upstream of humidograph(HGupstream_T)
- PMS PCASP Chan. 6 (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
- PMS PCASP Chan. 19 (1.30 micrometers < Dp < 1.40)(pa130_p140conc)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(RedTScatCoef_1um_LRH)
- 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)
- PMS PCASP Chan. 4 (0.16 micrometers < Dp < 0.18)(pa16_p18conc)
- PMS PCASP Chan. 8 (0.26 micrometers < Dp < 0.30)(pa26_p30conc)
- RH downstream of humidograph(HGdownstream_RH)
- Single wave Neph. RH(RH530nm)
- PMS PCASP Chan. 12 (0.45 micrometers < Dp < 0.50)(pa45_p50conc)
|
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)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- Relative humidity in sample line down. of heater(SampRH)
- B_sp, at 530 nm from single wave. neph.(Bscat530nm)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(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)
|
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 |
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)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(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)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- Relative humidity in sample line down. of heater(SampRH)
- B_sp, at 530 nm from single wave. neph.(Bscat530nm)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(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)
|
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer failure |
DataStreams: | sgpaosC1.a0
|
Description: | The backscatter shutter on the TSI 3-wavelength nephelometer failed and
the unit had to be replaced. Data are either missing or incorrect. |
Measurements: | sgpaosC1.a0: - TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 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)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(RedBScatCoef_10um_LRH)
- TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
- TSI High RH Neph. inlet temperature(TSINephTin_HRH)
- TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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 Low RH Neph. relative humidity(TSINephRHSamp_LRH)
- 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. inlet temperature(TSINephTin_LRH)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
|
Subject: | SGP/AOS/C1 - Instrument communications problems |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | Several of the AOS instruments apparently lost communications with the AOS computer during
this period. These instruments were the TSI 3-wavelength nephelometer, the PSAP light
absorption photometer, and the Dasibi ozone instrument. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- Pressure difference across TSI neph.(Line8DeltaP)
- Transmittance through CLAP filter(BapFiltr)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- Ozone zero concentration(O3_Zro)
- unknown(O3_Cont)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- Ozone sample frequency(O3_Samp)
- Ozone offset value(O3_Offset)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- 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)
- Ozone sample pressure(O3_Press)
- TSI Low RH Neph. lamp voltage(TSINephLV_LRH)
- Ozone line temp. from thermocouple attached to heater(O3_LinHeater)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- CLAP flow(BapFlow)
- Ozone span concentration(O3_Spn)
- TSI neph. rack temperature(CabinetTemp)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- Ozone span value(O3_Span)
- 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. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- Ozone line temperature set point(O3_SetPt)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- 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. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- Ozone sample temperature(O3_Temp)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
- Ozone line sample temperature (omega temp. sensor)(O3_LinTemp)
- TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
- CLAP Signal(BapSignal)
- CLAP reference signal(BapRef)
- Ozone mode(O3_Mode)
sgpaosC1.a0: - TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- 1 um Absorption coefficient(Bap_I_1um)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
- Ozone concentration(Ozone)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
|
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer data missing |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The AOS TSI 3-wavelength nephelometer lost communications with the AOS data system during
this period. Cause of the communications break is unknown. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- 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 Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- 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. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- 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. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- 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)
sgpaosC1.a0: - TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- Single wave Neph. pressure(Pres530nm)
- 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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- Single wave Neph. RH(RH530nm)
- Radiance neph. temperature(Neph530Temp)
|
Subject: | SGP/AOS/C1 - Line 8 bypass in wrong position |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The Line 8 bypass valve was stuck in the wrong position. Consequently, air was not being
drawn through the TSI 3-wavelength nephelometer and the PSAP light absorption photometer,
and thus they were not measuring ambient (outdoor) aerosols. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- Transmittance through CLAP filter(BapFiltr)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- 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 Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- CLAP flow(BapFlow)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- 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. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- 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. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- 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 reference signal(BapRef)
- CLAP Signal(BapSignal)
sgpaosC1.a0: - TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- 1 um Absorption coefficient(Bap_I_1um)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
|
Subject: | SGP/AOS/C1 - Aerosol sampling system and nephelometer failure |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The electronic valve that switches the aerosol sampling system from sampling the total
aerosol (D<10 um) to the submicrometer (D<1 um) aerosol began having intermittent
positioning problems. All 3-wavelength nephelometer and light absorption photometer data collected
during this time period should be viewed as suspect, since we can't be sure what
particle size range was being sampled at any time. During this interval, the nephelometer lamp
became unstable and finally blew, giving no nephelometer data for the end of this period.
The period of lamp failure in the AOS data files can be recognized by prolonged periods
of missing value codes for aerosol scattering and nephelometer housekeeping channels. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- Transmittance through CLAP filter(BapFiltr)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- 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 Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- CLAP flow(BapFlow)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- 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. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- 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. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- 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 reference signal(BapRef)
- CLAP Signal(BapSignal)
sgpaosC1.a0: - TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- 1 um Absorption coefficient(Bap_I_1um)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- Single wave Neph. pressure(Pres530nm)
- 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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- Single wave Neph. RH(RH530nm)
- Radiance neph. temperature(Neph530Temp)
|
Subject: | SGP/AOS/C1 - 3-wavelength nephelometer data missing |
DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0
|
Description: | The AOS data system lost communications initially with the 3-wavelength TSI nephelometer.
A communications port on the Sun workstation became locked, and attempts to unlock it
were unsuccesful. Stopping and restarting the data collection software did not solve the
problem. Missing value codes were being generated for all TSI nephelometer measurements
and parameters. The decision was made to reboot the workstation. On 981110, at 1555 GMT,
the workstation was rebooted. We discovered then that we did not have the proper root
user password to log back onto the system and restart the software. From 981110 (1555GMT)
to 981112 (0501GMT) no data were being logged by the AOS data system. |
Measurements: | sgpaosauxC1.a0: - TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
- TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
- TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
- TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
- TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
- TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
- TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
- TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
- TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
- 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 Low RH Neph. lamp voltage(TSINephLV_LRH)
- TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
- TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
- TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
- TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
- TSI High RH Neph. lamp voltage(TSINephLV_HRH)
- TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
- 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. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
- TSI High RH Neph. lamp current(TSINephLC_HRH)
- TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
- TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
- 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. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
- TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
- TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
- TSI Low RH Neph. lamp current(TSINephLC_LRH)
- TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
- 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)
sgpaosC1.a0: - TSI High RH Neph. Pressure(TSINephPres_HRH)
- TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- TSI Low RH Neph. Pressure(TSINephPres_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
- TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- Single wave Neph. pressure(Pres530nm)
- 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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- 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)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- Single wave Neph. RH(RH530nm)
- Radiance neph. temperature(Neph530Temp)
|
Subject: | SGP/AOS/C1 - Intermittent leak in AOS spare sampling line and thermal sensitivity |
DataStreams: | sgpaosC1.a0
|
Description: | Starting on 980619, periodic fluctuations in several of the measured AOS parameters (e.g.,
Aerosol light absorption coefficent, TSI nephelometer relative humidity, condensation
particle counts, etc.) were observed. The start of these fluctuations coincided exactly
with the shutdown of the AOS for power washing of the wooden stairs and stack platform.
Numerous attempts at troubleshooting were conducted via telephone with technicians at the site.
These concentrated on 1) trying to find an electrical noise problem or 2) determining
whether our stack heating unit was somehow producing particles. Tests were devised to check
both of these possibilities, and both were determined to be non-problems. The
troubleshooting of this signal fluctuation problem was compounded and delayed by the concurrent
unrelated electronic ball valve problem (see AOS DQR#980731.1).
Pat Sheridan and Jim Wendell from the NOAA Aerosols Group went to the SGP Central Facility
to diagnose and repair the problem. All electromagnetic noise possibilities, including
bad grounds and RF fields were checked. These were not causing the fluctuations, which
varied in period from ~15-30 minutes. Upon dismantling the insulated air intake assembly
inside the trailer, a minute crack was found in one of the spare sampling lines at its
connection to the manifold. This line was one of the original installed by the previous mentor.
Repair of this line break essentially repaired the fluctuation problem, although this
extensive troubleshooting revealed a slight temperature dependence for some of our reference
signals (more on this below).
Our explanation of this problem is as follows. When the AOS stairs were power washed,
either the activities associated with power washing (e.g. people or compressors on the
platform) or lowering the stack caused enough vibration to cause a hairline break in the spare
sampling line at the connection with the manifold. We believe this tubing is
high-density polyethylene, which is semi-rigid, and it has now been replaced with less brittle
material. The routine daily system zero checks established by the previous mentor would not
have detected this leak problem, because overpressurization of the manifold with
particle-free air showed up as good zero checks in all instruments and some of this clean air
would have simply flowed out of the spare line tubing crack. Since the crack was beneath at
least two layers of foam insulation which itself was covered with foam-backed metallic
tape, we believe that free air flow of trailer air to the crack was not likely. However,
during periods when the large air conditioning unit was on, pressurization of the trailer
caused air to slowly leak into the spare sampling line and back into the manifold and
other sampling lines. Upon arrival at the site, we found the fan for the A/C system
operating only when the A/C compressor came on. We were informed by Dan Nelson, Site Engineer,
that this fan is supposed to stay on all the time. Our data suggest that this fan has
been off since before the problem began. This is fortuitous, because the trailer was not
continually pressurized and room air was not sampled continuously over this period.
Thus, only a portion of the data are of questionable quality. This leak was not immediately
obvious (to AOS technicians or to us) because of its concealed location and because some
aerosol measurements (e.g., particle number concentrations, aerosol light absorption
coefficents, etc.) did not change dramatically during these periods (i.e., the aerosols
brought inside the trailer through the cooling system were often not much different in
concentration or optical properties than were aerosols sampled at the top of the stack). Thus
data during the A/C periods will be labeled as questionable.
We will institute a new leak check/zero check procedure which should catch leaks of this
type. The old system zero check devised by the previous mentor was insufficient to find
this leak.
The A/C unit in the AOS trailer is more than adequate to cool that space. The cold air
that comes out of the vents is probably >20F cooler than trailer air. This cold air causes
slight fluctuations in the lamp voltages and reference signals of several of our
instruments. We expect this problem to be more severe in the summertime because of increased
air conditioner use and indoor temperature swings. Fortunately, these signal fluctuations
are not observed in the final processed signals from these instruments. They do,
however, suggest that a gentler cooling of the trailer should be considered.
Possibilities for this could include:
1) Installation of a smaller air conditioning unit
2) Changing the ratio of outside air mixed in with the cooled air
3) Venting the exhaust from the cabinets into the air recirculating
system to preheat the cooled air.
We realize that these suggestions may not be in line with the notion of efficient cooling
of the trailer. However, we feel that the root cause of the observed temperature
fluctuations is that the air conditioning unit has far more capacity than is needed by the AOS
trailer. A smaller air conditioner, properly matched to the heat load of the trailer,
would probably be a more efficient solution.
Since the cooling of the trailer generally was faster than the warming-up period, a
majority of data should be valid. Also, not all measurements appeared questionable (i.e., the
data did not appear to change when the A/C unit came on). We have flagged all aerosol
data as "questionable" during A/C "on" periods because of the likelihood that at least some
mixing of trailer air with ambient air occurred. |
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)
- PMS PCASP Chan. 15 (0.70 micrometers < Dp < 0.80)(pa70_p80conc)
- PMS PCASP Chan. 0 (Dp > 10 micrometers)(Pa1000Conc)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- PMS PCASP Chan. 21 (1.60 micrometers < Dp < 1.80)(pa160_p180conc)
- PMS PCASP Chan. 9 (0.30 micrometers < Dp < 0.35)(pa30_p35conc)
- PMS PCASP Chan. 27 (3.50 micrometers < Dp < 4.00)(pa350_p400conc)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- PMS PCASP Chan. 13 (0.50 micrometers < Dp < 0.60)(pa50_p60conc)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_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)
- PMS PCASP Chan. 16 (0.80 micrometers < Dp < 0.90)(pa80_p90conc)
- Ozone concentration(Ozone)
- 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)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_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)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- B_sp, at 530 nm from single wave. neph.(Bscat530nm)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(BluTScatCoef_1um_LRH)
- 10 um Absorption coefficient(Bap_I_10um)
- TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
- PMS PCASP Chan. 19 (1.30 micrometers < Dp < 1.40)(pa130_p140conc)
- PMS PCASP Chan. 6 (0.20 micrometers < Dp < 0.23)(pa20_p23conc)
- PMS PCASP Chan. 30 (6.50 micrometers < Dp < 8.00)(pa650_p800conc)
- TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
- 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 High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(RedTScatCoef_1um_LRH)
- 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)
- 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 High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- PMS PCASP Chan. 14 (0.60 micrometers < Dp < 0.70)(pa60_p70conc)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- PMS PCASP Chan. 12 (0.45 micrometers < Dp < 0.50)(pa45_p50conc)
|
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)
- total scattering coefficient, 550 nm, 1 um size cut, low RH(GrnTScatCoef_1um_LRH)
- total scattering coefficient, 700 nm, 10 um size cut, low RH(RedTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 1 um size cut, low RH(BluBScatCoef_1um_LRH)
- total scattering coefficient, 450 nm, 10 um size cut, low RH(BluTScatCoef_10um_LRH)
- total scattering coefficient, 450 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 700 nm, 10 um size cut, low RH(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)
- total scattering coefficient, 700 nm, 1 um size cut, low RH(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)
- back-scattering coefficient, 550 nm, 1 um size cut, low RH(GrnBScatCoef_1um_LRH)
- back-scattering coefficient, 550 nm, 10 um size cut, low RH(GrnBScatCoef_10um_LRH)
- back-scattering coefficient, 700 nm, 1 um size cut, low RH(RedBScatCoef_1um_LRH)
- total scattering coefficient, 550 nm, 10 um size cut, low RH(GrnTScatCoef_10um_LRH)
- back-scattering coefficient, 450 nm, 10 um size cut, low RH(BluBScatCoef_10um_LRH)
- TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
|