A reliable and efficient way is proposed for investigating the electromagnetic (EM) scattering from a large marine environment containing multiple vessels. To enhance the computational efficiency, an improved method is proposed based on the facet-based simplified small slope approximation to calculate the scattering field from the sea surface. In addition, the overall sea surface is decomposed into noncoupled and coupled regions. Then, this letter uses a combined method based on the geometrical optics/physics optical method and the physical theory of diffraction method for studying the scattering field from the targets and the coupling scattering field between the targets and the sea surface in the coupled region. Numerical results show that the proposed method has advantages of higher efficiency and good accuracy compared with the original EM model and it can be applied to simulate synthetic aperture radar (SAR) images of a marine environment with ships.

中文翻译：

---

研究多船海洋环境电磁散射的有效方法

提出了一种可靠有效的方法来研究来自包含多艘船只的大型海洋环境的电磁 (EM) 散射。为提高计算效率，提出了一种基于小面简化小斜率近似计算海面散射场的改进方法。此外，整个海面被分解为非耦合区和耦合区。然后，本文采用基于几何光学/物理光学方法和衍射物理理论的组合方法来研究来自目标的散射场以及耦合区域内目标与海面之间的耦合散射场。