DESIS and Copernicus Sentinel-2 Surface Reflectance, AOT and WV Products compared to measurements on ground

Abstract

PACO atmospheric correction software is implemented in the DESIS L2A processor providing Bottom-Of-Atmosphere (BOA) ground reflectance spectral image cube together with aerosol optical thickness (AOT) and integrated water vapour (WV) maps. PACO can also be applied to Sentinel-2 data providing equivalent outputs. This presentation will rely on reference measurements of SR, AOT and WV which had been performed on ground in parallel to DESIS acquisitions in August 2019 and 2020. Microtops photometers are used for measurements of the atmospheric parameters and SR measurements on ground used a hyperspectral SVC spectroradiometer covering the spectral range from 380 nm to 2.5 µm. There are Sentinel-2 overpasses over the same area at the same day. Both DESIS and Sentinel-2 data were be processed with PACO and then compared to the available reference measurements.