A semiempirical model for electromagnetic scattering from dielectric 1-D dielectric sea surface covered by oil film

In this paper, electromagnetic (EM) scattering from one-dimensional dielectric sea surface covered by oil film is investigated by a semiempirical model of modified second-order small slope approximation referred to as (SSA2-TL) for both HH and VV polarizations. The second order terms of the small slope approximation method have been numerically implemented in order to obtain accurate results for a large range of slope. The sea surfaces are modeled as realizations of a Gaussian random process with the Pierson-Moskowitz spectrum, while the tapered incident wave is chosen to reduce the truncation error. Several numerical results are presented to show that second-order small slope approximation (SSA-II) have a rather good accuracy than first-order small slope approximation (SSA-I) and to validate our semiempirical model of SSA2-TL by comparison with benchmark method of method of moments (MoM).