弱流场调制下的海面微波散射模拟研究  

Research on the simulation of microwave backscattering at the sea surface modulated by one-dimension weak currents

作　　者：吕伟艳[1] 赵朝方[1] 杜涛[2] 

机构地区：[1]中国海洋大学海洋遥感研究所,山东青岛266003 [2]中国海洋大学海洋环境学院,山东青岛266003

出　　处：《海洋科学》2008年第7期57-61,70,共6页Marine Sciences

基　　金：微波成像国家重点实验室项目(51442020303JW1002)

摘　　要：根据海面微波散射的多尺度模型以及波流相互作用理论,对一维弱流场调制下的海面微波散射截面进行了数值模拟。结果表明,利用数值方法直接求解波作用量方程获得的海浪调制谱并结合多尺度模型可以较好地模拟弱流场引起的雷达散射截面的变化。内波等海洋现象调制了海浪谱,使得雷达散射截面反映出这些海洋特征,整个调制过程的模拟对于分析这些海洋现象并更好地利用其雷达数据具有重要意义。The wave spectrum is modulated by the oceanic phenomena of internal waves, etc. It is valuable to simulate the courses of modulating and imaging for analyzing the oceanic phenomena and making better use of their radar data. Based on the stochastic, multi-scale model of microwave backscatter from the ocean and the theory of wave-current interaction, the radar cross section modulated by one-dimension weak currents has been modeled. Based on the conditions of the ocean environment and the radar parameters, the radar cross section was simulated using the input of the one-dimension current. The study indicates that the input modulated wave spectrum from integrating wave action balanced equation directly can describe the variance of radar cross section induced by weak currents.

关 键 词：微波散射模型 弱流场 波流相互作用 雷达散射截面 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]