基于半确定性面元模型的海面散射系数仿真  

Simulation of Sea Scattering Coefficient Based on Semi-deterministic Facet Model

作　　者：冯明 安锐 张润俊 FENG Ming;AN Rui;ZHANG Run-jun(Science and Technology on Electromagnetic Scattering Laboratory,Shanghai 200438,China)

机构地区：[1]电磁散射重点实验室,上海200438

出　　处：《制导与引信》2020年第3期30-34,共5页Guidance & Fuze

基　　金：国家自然科学基金(51706145,61971288,61901269)。

摘　　要：针对海面合成孔径雷达图像解译和海杂波特性分析中的海面散射系数难以高效求解的问题,提出了一种基于半确定性面元散射模型的海面电磁散射系数仿真方法。该方法采用微扰法对海面单元的微粗糙表面进行散射系数建模,并用基尔霍夫近似法对垂直西元的入射区进行修正,实现了确定海面样本的海面散射系数求解。利用半确定性面元散射仿真模型仿真生成海面后向散射系数,并与造波池测试数据进行对比,仿真结果验证了该模型的准确性。A semi deterministic facet scattering cofficient simulation model is proposed to solve the problems of sea surface scattering coefficient in sea synthetic aperture radar(SAR)image interpretation and sea clutter characteristics analysis.The scattering cofficient of sea surface elements is modeled by perturbation method,the incident area of the facet is modified by Kirchhoff approximation,and the scattering coefficient of the determined sea surface samples is obtained.The proposed model is used to generate the backscattering coefficient of the sea surface,and the comparison with the test data of the wave pool verifies the accuracy of the model.

关 键 词：散射系数 半确定性面元 微扰法 基尔霍夫近似 

分 类 号：TN011[电子电信—物理电子学]