基于单积分方程矩量法的海洋表面微波散射模拟

Simulation of Microwave Scattering from Ocean Surfaces by the Methodof Moments Based on Single Integral Equation

本文使用单积分方程矩量法 ,对风场驱动下的海洋表面微波散射进行数值模拟 .海洋随机粗糙面用三角形贴片模型来拟合 ,核心算法是基于快速傅立叶变换技术的多层稀疏矩阵规范网格法 .针对海水的高导电性 ,引入了局部化近似方法 .数值结果验证了算法的正确性和计算效率 ,并对L波段的微波散射进行了计算分析 .

A fast approach for analysis of microwave scattering from wind-driven ocean surfaces is developed using the single integral equation with the method of moments. Triangular patches are employed to tightly model the random rough surfaces. The underlying algorithm is the FFT-based multilevel sparse-matrix canonical-grid method. A localized approximation method is introduced for the highly conductive seawater medium. Numerical examples are provided to demonstrate the merits of the proposed scheme. Simulation results are presented for ocean-like surfaces illuminated by microwave beams at L-band.