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Capabilities / Instruments

PSAP-AIR

Particle soot absorption photometer aboard aircraft

Baseline Instrument, Guest

The particle soot absorption photometer collects aerosol particles on a substrate and measures the change in light transmission relative to a reference filter. Bulk particle absorption is derived after correcting for scattering effects. It samples from the Counterflow Virtual Impactor (CVI) and isokinetic inlets.

Primary Measurements

Aerosol absorption

Handbook Browse Data

Contact

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Mikhail Pekour
Lead Mentor Pacific Northwest National Laboratory

References

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Mei et al. Single-Channel Tricolor Absorption Photometer (STAP) Instrument Handbook. 2020. 10.2172/1734658.

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Resources

Atmospheric Radiation Measurement (ARM) | Reviewed March 2025