海面散射仿真中不同波浪谱和松弛率模型选取的对比研究  

The Selection of the Spectrum and Relax Rate Model in the Ocean Backscatter Simulation

作　　者：王小青[1] 余颖[1] 陈永强[1] 朱敏慧[1] 

机构地区：[1]中国科学院电子学研究所微波成像国家重点实验室,北京100190

出　　处：《电子与信息学报》2010年第2期476-480,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(40706063);微波成像技术国家重点实验室基金(MITL-2008-01)资助课题

摘　　要：海面微波散射仿真对于实孔径、合成孔径雷达海洋遥感应用研究以及海洋监测雷达系统设计和信号处理都有很重要的意义,目前的海面散射仿真方法主要是基于复合表面模型来进行的,这些仿真方法都要用到海浪谱和松弛率模型。由于海浪谱、松弛率尤其是小尺度部分难以精确测量,不同的实验和拟合方法得到的模型有较大的差别,从而导致仿真海面散射结果往往相差较大,常常让人不知如何选取。该文比较了几种典型的海浪谱和松弛率模型的海面散射仿真结果与实测数据的差异,结果表明Romeiser提出的波浪谱在L-Ku波段,2-20m/s风速范围内较其他波浪谱更好。而两种主要的松弛率模型的仿真结果差异不大。该结果可作为海面散射仿真中选取波浪谱和松弛率模型的参考。The ocean backscatter simulation is an important work for the ocean radar remote sensing application research and the design of the radar system for the ocean surveillance. Most of the ocean backscatter simulation models are based on the composite surface model, which involves the ocean wave spectrum and relax rate model. The numerous ocean spectrum and relax rate models are quite different from each other due to the different experimental and data fix methods. The different ocean spectrum and relax rate often lead to different ocean backscatter simulation results. In this paper, some typical ocean spectrum and relax rate models are used for the backscatter simulation and the results are compared with the experimental ocean scattering data. The comparison shows that the Romeiser spectrum model is better than other ocean spectrum models under the L-Ku band and 2-20m/s wind velocity, and the simulation results using different relax rate models are almost equivalent.

关 键 词：海面散射 波浪谱 松弛率 

分 类 号：TN959.72[电子电信—信号与信息处理]