aospass3w

The photoacoustic soot spectrometer (PASS) measures light absorption by aerosol particles. As the particles pass through a laser beam, the absorbed energy heats the particles and in turn the surrounding air, which sets off a pressure wave that can be detected by a microphone.

The PASS instruments can also simultaneously measure the scattered laser-light at three wavelengths and therefore provide a direct measure of the single-scattering albedo.

The PASS is part of the aerosol observing system (AOS).

Absorption, 532 nm wavelength
Scattering coefficient, 405 nm wavelength

Southern Great Plains - Central Facility, Lamont, OK

• Latitude: 36.607322
• Longitude: -97.487643
• Publication Date: 2009-02-19
• Start Date: 2009-02-19
• End Date: 2015-10-01
• Last Updated: 2016-02-23

https://www.arm.gov/connect-with-arm/organization/instrument-mentors/list#pass

None

http://dx.doi.org/10.5439/1190011