MAAP
Multi-Angle Absorption Photometer

The Multi-Angle Absorption Photometer (MAAP) is an in situ aerosol optical sensor developed by Thermo Scientific. It provides continuous measurements of black carbon concentrations and aerosol light-absorption properties. It features multiple detectors that measure transmitted and scattered light simultaneously at scattering angles of 130 and 165 degrees. MAAP operates at a wavelength of 670 nm and has a typical time resolution of 2 minutes. It is part of the Langlely Aerosol Research Group Experiment (LARGE) instrument suite and can be used for both ground-based and airborne operations.