부산대학교 도서관

Satellite hyperspectral imaging is a fast-growing domain supported by several recently launched satellites (PRISMA, EnMap). Many other missions are planned for the years to come with various improvements such as spatial coverage, revisit or spatial resolution (CHIME, SBG, French hyperspectral mission, etc.). In this context, CORATHYP, a new atmospheric correction code, has been developed in order to extract hyperspectral surface reflectances from satellite measurements, taking advantage of the high spectral resolution for a better characterisation of the atmospheric composition.In CORATHYP, gas concentrations and aerosol properties are first initialized using ECMWF and CAMS data. Then finer water vapour content and aerosol optical thickness are directly retrieved from the acquired image. Afterwards, atmospheric perturbations are corrected to get surface reflectances, by taking into account the scene topography and adjacency effects. All radiative transfer variables are computed by SOS-ABS, a radiative transfer model coupling gas absorption and diffusion, including polarisation effects.