Modeling surface topography during atmospheric correction improves reflectance retrievals in imaging spectroscopy
Abstract
Atmospheric correction in rugged terrain must account for the influence of topography particularly slope and aspect on incident solar radiation. Traditional approaches that consider topography implement a post-hoc procedure commonly referred to as a topographic correction. However, post-hoc correction does not allow for a differential treatment of diffuse and direct radiation, which is critical in defining the color of radiation that reaches the surface and the subsequent reflectance retrieved. In this work, we describe an approach to account for topographic effects during the initial inversion of atmosphere and surface properties by enhancing the forward model to account for the radiative transfer effects of slope and aspect of the surfaces. Preliminary results demonstrate the magnitude of the effect, and the efficacy of this approach in areas with rugged terrain, as compared to traditional approaches.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2021
- Bibcode:
- 2021AGUFMGC15B0694C