POSTER SESSION 3
15:30–17:30, Wednesday, September 16
Poster Session | 1 | 2 | 3 | 4 | Schedule at a Glance
ABSTRACT 1378 | POSTER 183
POLARIZED MULTI-DIRECTIONAL SIMULATIONS FOR ATMOSPHERIC AND ADJACENCY CORRECTION OF COASTAL OBSERVATIONS WITH 3MI AND METIMAGE (EPS-SG)
Accurate atmospheric correction is a prerequisite for retrieving reliable water-leaving reflectance from satellite ocean color observations, yet remains particularly challenging in coastal environments. In such areas, aerosol properties and complex water optical properties complicate the correction, while land-sea contrasts introduce significant adjacency effects, requiring a dedicated correction to avoid large errors on the retrieved water reflectance. The MetOp-SG platform launched in August 2025, carrying the multi-angle polarimeter 3MI and the high-spatial-resolution radiometer METimage, offers an unprecedented opportunity to address these limitations through synergistic use of multi-directional, polarimetric and multi-resolution observations.
As a first step towards developing atmospheric and adjacency correction algorithms tailored to these instruments, we present a framework for simulating synthetic top-of-atmosphere (TOA) datasets representative of diverse coastal observation scenarios. Radiative transfer simulations are performed using the SMART-G code, including adjacency effects, and spanning a wide range of aerosol types (maritime, desert dust, biomass burning), optical depths, viewing geometries, and water optical properties — from clear open-ocean to turbid coastal waters. Polarized, multi-directional radiance fields are simulated to match the specific observation configurations of 3MI and METimage, including their respective spatial resolutions and spectral characteristics.
We present first results from the exploitation of these synthetic datasets to design and assess atmospheric and adjacency correction strategies, with a particular focus on quantifying the added value of polarimetry and multi-directionality over conventional single-angle, intensity-only approaches.
Pierre Posson*, Hygeos, [email protected]
François Steinmetz, Hygeos, [email protected]
Didier Ramon, Hygeos, [email protected]
Jérôme Riedi, Laboratoire d’Optique Atmosphérique, [email protected]
Poster Session | 1 | 2 | 3 | 4 | Schedule at a Glance
