SAR image simulation analysis of sea surface containing underwater object wake

摘要

This paper mainly focuses on the effect of underwater motion of object on electromagnetic scattering of sea surface. For this purpose, a method combing computational fluid dynamics and electromagnetic imaging is presented. First, a linear filter model is used to simulate the sea surface, and a numerical simulation method is used to form the wake fields of underwater object when is prowls in the stratified fluid. The electromagnetic scattering characteristic of composite sea surface are analyzed be semi-deterministic surface element scattering. Finally, the imaging simulation of synthetic aperture radar (SAR) with velocity beam modulation is carried out. The results show that the underwater object can be detected by SAR images with different polarizations.