Atmospheric correction scheme using the spectral relationships in the aerosol multiple-scattering reflectance (SRAMS)

Abstract

An important part of the atmospheric correction process in ocean color remote sensing from a satellite is an estimation of the aerosol multiple-scattering reflectance. Utilization of two near-infrared (NIR) bands to determine the appropriate aerosol model and concentration has been widely adopted for the aerosol reflectance correction. To know the most two closest aerosol models with their mixing factor regarding an optimization in two NIR bands, the first atmospheric correction algorithm for Geostationary Ocean Color Imager (GOCI) has used a relationship between single-scattering and multiple-scattering aerosol reflectance, which was developed for the processing of the Sea-viewing Wide Field-ofview Sensor (SeaWiFS).In this study, a methodologically accurate and straightforward aerosol multiple-scattering reflectance correction scheme for the GOCI atmospheric correction is suggested. We found that the spectral relationships in the aerosol multiple-scattering reflectance between different wavelengths (called SRAMS) can be established while the aerosoloptical thickness varies for different aerosol models and solar-sensor geometries. In the aerosol correction scheme using SRAMS, the multiplescattering reflectance from aerosols in the presence of air molecules is directly calculated without separately considering the single-scattering model. It first determines the two most appropriate aerosol models by comparing thee aerosol model and concentration has been widely adopted for the aerosol reflectance correction. To know the most two closest aerosol models with their mixing factor regarding an optimization in two NIR bands, the first atmospheric correction algorithm for Geostationary Ocean Color Imager (GOCI) has used a relationship between single-scattering and multiple-scattering aerosol reflectance, which was developed for the processing of the Sea-viewing Wide Field-ofview Sensor (SeaWiFS).In this study, a methodologically accurate and straightforward aerosol multiple-scattering reflectance correction scheme for the GOCI atmospheric correction is suggested. We found that the spectral relationships in the aerosol multiple-scattering reflectance between different wavelengths (called SRAMS) can be established while the aerosoloptical thickness varies for different aerosol models and solar-sensor geometries. In the aerosol correction scheme using SRAMS, the multiplescattering reflectance from aerosols in the presence of air molecules is directly calculated without separately considering the single-scattering model. It first determines the two most appropriate aerosol models by comparing the