Overview of random rough surface scattering EM models: Application to the sea surface

In this paper, we present in a first step an overview on different models of electromagnetic scattering by random rough surfaces especially the composite two-Scale Model - CTSM (in order one and two). The numerical results computed for the bistatic radar cross-section from random rough surfaces especially from the sea surface using the Cox & Munk´slopes distribution and the sea surface spectrum of Elfouhaily. The results obtained by CTSM2 are compared with those given by the existing models (Small Slope Approximation, Weighted Curvature Approximation and CTSM1). These results will be used to examine the applicability of several bistatic reflectivity clutter models especially for near-grazing angles and for Ku-band.