AOS: 3 wavelength Particle Soot Absorption Photometer

The oliaospsap3wM1.a1 datastream contains measurements of aerosol absorption from the Aerosol Observing System (AOS) 3-wavelength Particle Soot Absorption Photometer. This instrument collects aerosol particles on a substrate and measures the change in light transmission relative to a reference filter to derive bulk particle absorption, correcting for scattering effects. The data were collected at Facility M1 (Oliktok Point, Alaska; AMF3), which is located at the OLI site (Oliktok Point, AK, USA; Long-term Mobile Facility), between August 6, 2016, and June 15, 2021. More information about the instrument can be found at the following link: Instrument Handbook.