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 has 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 ground-based and airborne operations.