Electromagnetic scattering and Doppler spectra analysis of sea surface covered by oil spills

Lombardini et al. [1] have demonstrated that the ripples on a sea surface covered by oil films exhibit a damping effect. The damping effect reduce the RMS slope and RMS height of the sea surface, and thus have an influence on the electromagnetic scattering features, as well as the Doppler spectra signature of the backscattered returns from dynamic sea surface. Consequently, electromagnet tic scattering and Doppler spectra analysis of one dimensional (1-D) dielectric sea surface covered by oil films is conducted in this paper based on parallel fast multiple method. 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 the influence of the oil slicks on the angular distribution of the scattered intensities, as well as the Doppler spectra signature of the backscattered returns by comparison with a clean sea surface.