多视角多波段SAR浅海地形反演研究  

Multiple Points of View and Multiband SAR for Underwater Simulation Research

作　　者：王静[1,2] 陈永强 李宁[1,2] 徐真[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100039

出　　处：《雷达科学与技术》2015年第4期375-383,389,共10页Radar Science and Technology

基　　金：国防重大专项基金资助(No.GFZX0413702)

摘　　要：在SAR浅海地形成像基本原理的基础上,对现有的流场仿真和微波成像模型进行研究,选择二维水动力模型和比较成熟的M4S仿真软件,建立了SAR对浅海地形成像模型,使用该模型对准一维地形进行仿真实验,综合分析了气象水文条件(风场和流场)和雷达参数(波段、极化和入射角)对SAR成像的影响,仿真结果说明SAR对浅海地形成像受到上述条件的综合影响。传统的浅海水下地形反演方法都是在单视角单波段的情况下进行的,而多视角多波段SAR浅海地形研究则考虑了多个入射角和多个波段的不同影响,通过仿真结果分析可知,提出的方法能有效提高反演精度和抗噪性能。On the basis of the basic principle of SAR imaging shallow sea topography, the existing flow field simulation and microwave imaging model are studied. The two-dimensional hydrodynamic model and a more mature M4S simulation software are selected. The shallow sea topography SAR imaging model is es- tablished. One-dimensional terrain simulation is made using this model. The comprehensive analysis of the meteorological hydrological conditions （wind field and flow field） and the influences of radar parameters （wavelength, polarization and incident angle） on SAR imaging are also conducted. The simulation results show that the shallow sea topography SAR imaging is affected by these conditions. The traditional shallow underwater topography inversion was conducted in the case of single angle and single band. The multiple points of view and multiband SAR neritic underwater topography research in this paper considers the different influences of multiple angles of incidence and multiple wavelengths. The simulation results show that the proposed method can improve the anti-noise performance.

关 键 词：多视角 多波段 合成孔径雷达 浅海地形 

分 类 号：TN958[电子电信—信号与信息处理] TP79[电子电信—信息与通信工程]