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National Aeronautics and Space Administration

Goddard Space Flight Center

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SMART-COMMIT-ACHIEVE

COMMIT Instruments

COMMIT: Chemical, Optical, and Microphysical Measurements of In-Situ Troposphere

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Aerodynamic Particle Sizer (APS) - TSI


Usage: designed to measure aerodynamic particle size spectra
Size range: 5.6–560 nm
Remarks: uses a high voltage source to neutralize and charge particles for detection, having a 0.1 Hz sampling rate with 32 size detection channels

Website: http://www.tsi.com/

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Aethelometer - Magee Scientific


Usage: designed to measure light absorption due to aerosol particles
Spectral channels: 370, 470, 520, 590, 660, 880 and 950nm.
Remarks: filter–based technique, automatic filter advancement

Website: http://www.mageesci.com/

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CAPS PMex Monitor (Particle Optical Extinction)- Aerodyne Research


Usage: designed to measure aerosol optical extinction coefficients

Remarks: three units, one for each channel, utilize Cavity Attenuated Phase Shift (CAPS) technique, and eliminate the need for a filter and the associated interference (can be combined with nephelometers to determine the aerosol single scattering albedo)

Website: http://www.aerodyne.com/

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Cloud Condensation Nuclei Counter (CCN100)


Usage: designed to measure droplet size distributions

Website: http://www.dropletmeasurement.com/products/airborne/CCN

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Fast Mobility Particle Sizer (FMPS)- TSI Inc.


Usage: designed to measure particle concentration and mobility size spectra
Size range: 5.6 – 560 nm
Remarks: uses a high voltage source to neutralize and charge particles for detection, having a 0.1 Hz sampling rate with 32 size detection channels

Website: http://www.tsi.com

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MetOne BAM-1020 (PM 2.5/PM10) Continuous Particle Monitor


Usage: designed to measure aerosol mass concentration

Remarks: two units for simultaneous measurements of PM2.5 and PM10 concentrations; both have U.S. EPA Federal Equivalent Method (FEM) designation and can work reliably under up to 90% ambient relative humidity

Website: http://www.metone.com

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Nephelometer 3-channel (TSI Neph)- TSI Inc.


Usage: designed to measure aerosol total- and backscattering coefficients
Spectral channels: 450, 550 and 700 nm
Remarks: two units with one measuring dry aerosols and the other measuring aerosols under ambient or actively controlled relative humidity levels, to study aerosol hy–groscopic properties

Website: http://www.tsi.com

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Particle Soot Absorption Photometer (PSAP)- Radiance Research


Usage: light absorption due to aerosol particles
Spectral channels: 467, 530, 660 nm
Remarks: filter–based technique, manual filter advance

Website: http://www.esrl.noaa.gov/gmd/aero/instrumentation/psap_desc.html

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RR Nephelometer - Radiance Research


Usage: designed to measure aerosol total scattering coefficients Spectral channel: 530nm.
Spectral channel: 530 nm
Remarks: Three identical instruments are installed to measure light scattering under three different relative humidity (RH) levels for studying aerosol hygroscopic properties

Website: http://www.esrl.noaa.gov/gmd/aero/instrumentation/RR_neph.html

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Scanning Mobility Particle Sizer Spectrometer (SMPS)- TSI Inc.


Usage: designed to measure particle concentration and mobility size spectra
Size range: 2.5 nm (minimum lower bound)–1000 nm (maximum upper bound) dependent upon flow settings; concentrations from 1–5x104 particles/cm3
Remarks: up to 167 total size channels; consists of an electrostatic classifier (Long DMA; TSI 3081), a Condensation Particle Counter (CPC; TSI 3782), and a soft X–ray Advanced Aerosol Neutralizer (AAN; TSI 3087); two identical units run in parallel under dry and wet (varying RH levels) conditions to study their hygroscopic properties

Website: http://www.tsi.com/

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Tapered Element Oscillating Microbalance (TEOM)- Thermo Scientific


Usage: designed to measure aerosol mass concentration and aerosol composition with ACCU system for filter collection

Remarks: uses cyclone size cutters on inlet system to allow alternate sampling of three size cuts – PM1, PM2.5, and PM10; chemical composition requires additional lab analysis of collected filter samples

Website: http://www.thermoscientific.com

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Trace Gas Analyzers- Thermo Electron Co.


Usage: designed to measure the concentration of trace gases such as CO, CO2, O3, SO2, NO and NOx.

Remarks: custom modification to NO/NOx/NOy, CO, and SO2 instruments for enhanced performance and sensitivity; NIST–traceable working standards are used for field calibration of the instruments in conjunction with an automatic calibrator (Thermo 146C).

Website: http://www.thermo.com/

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Weather and Visibility Meter (WVIS)- Optical Scientific


Usage: designed to provide optical measurements for precipitation, visibility, and present weather

Website: http://www.opticalscientific.com/

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Weather Transmitter (WXT520)- Vaisala


Usage: designed to measure pressure, temperature, relative humidity, wind speed, wind direction and precipitation

Website: http://www.vaisala.com/

Mission Status

SMART - Trailer is at GSFC for upgrades and analysis.

COMMIT - Trailer is in Taiwan for data collection and characterization.

ACHIEVE - Trailer recently returned from IPHEx field campaign in Maggie Valley, NC.