Microwave scattering from submerged object induced wake over rough sea surface

Abstract

This paper presents a numerical simulation of electromagnetic scattering from surface wakes excited by a submerged object over two-dimensional sea surface. Based on the thin ship theory, an open software is presented for the geometric modeling of wake including Bernoulli hump and Kelvin wake. Then the scattering coefficient calculations are carried out by using the second order small slope approximation (SSA-II) in monostatic and bistatic configurations. Numerical results show that the radar scattering from sea surface is decreased with the presence of twake in the vicinity of the specular direction. And the effect will be reduced by decreasing the speed and increasing the submergence depth. Moreover, the texture of wake pattern can be observed from the distribution of backscattering coefficients under low sea states.