Analysis of scattering characteristics of ship and its wake on the sea surface

In order to study the electromagnetic scattering characteristics of a composite scene of sea surface, ship and wake, this paper combines the methods of geometrical optics and physical optics (GO-PO), Kirchhoff approximation (KA) and facet scattering field model of sea surface. Firstly, the geometric model of the composite scene of sea surface and Kelvin wake is established by using Elfouhaily omnidirectional spectrum and classical ship wave generation theory. Secondly, the generated geometric model of the wake and sea surface is combined with the ship to generate a total scene model of sea surface, ship and wake. Finally, the scattering echoes of sea surface and wake are calculated by KA and facet scattering field model, in addition, the scattering echoes of ship and the coupling contribution between ship and sea surface are calculated by GO-PO. On this basis, the electromagnetic characteristics of the composite scene of sea surface, ship and wake under different conditions are discussed.