Evaluation of a Linear Inversion Method for retrieval of directional wave spectra from SAR look cross spectra

Abstract:

The feasibility of a Linear Inversion Method applied to Synthetic Aperture Radar cross spectra to retrieve wave directional spectra is investigated. The proposed method is computationally efficient and does not require any a priori information from wave or atmospheric models, as is usually the case with other approaches. It is also comparatively less sensitive to low signal-to-noise ratio image spectra, which in general hinders the disambiguation of the retrieved directional wave spectrum. Several test cases were computed employing a simulator of complex SAR image spectra considering a broad range of values of steepness for the Envisat and Sentinel-1 satellite configurations. The results of the simulated cases were employed as lookup tables to correct biases while retrieving directional wave spectra from Level 1 cross spectra. As the nonlinearities, not accounted for when applying a linear inversion, are …

Año de publicación:

2022

Keywords:

Fuente:

google