Scattering from canonical objects above a sea-like 1D rough surface from a rigorous fast method

This paper is devoted to scattering from a canonical object above a sea-like one-dimensional rough surface (two-dimensional problem). Such a problem involves a high number of unknowns and cannot be solved easily with a Method of Moments by using a direct LU inversion. Thus, a recently developed fast numerical method called Extended-PILE combined with FB-SA is used. First, a parametrization is proposed for the FB-SA by considering the sea surface only. Then, the convergence of E-PILE+FB-SA is tested for the scattering from a cylinder, a plate and a cross located above a rough surface obeying a Gaussian process with the Elfouhaily et al. spectrum. After generating several surface realizations, a Monte Carlo process is applied on the scattered fields in order to discuss on the Normalized Radar Cross-Section (NRCS) for a maritime application at microwave frequencies. Eventually, the study focuses on the case of low grazing incidence.