ATMOSPHERIC CORRECTION APPROACH FOR SABIA-MAR OCEAN COLOR MISSION

The SABIA-Mar satellite mission, developed by CONAE, aims to provide valuable information and products for studying marine ecosystems, the carbon cycle, coastal dynamics, and marine habitats. The SABIA-Mar main cameras (measuring from visible to short wave infra-red) have a non-conventional design, since each spectral band has different viewing angles, which raises a challenge for the application of traditional atmospheric correction (AC) schemes. This work presents a preliminary analysis, based on simulated data sets, of uncertainties in the AC algorithm proposed for SABIA-Mar to retrieve water reflectance. This algorithm, a version of the standard AC scheme, was applied to SABIA-Mar angular and spectral characteristics, and the results compared to those obtained assuming the same viewing geometry for all the spectral bands. Performance is slightly degraded for the SABIA-Mar geometrical configuration, but the statistical results meet the goals of the SABIA-Mar mission and the requirements for ocean color applications.