三维动态海面建模与海洋回波模拟  

Three-dimensional dynamic sea surface modeling and ocean echo simulation

作　　者：王文超 杨华[1] 张浩[1,2] 陈玉杰 王雪 WANG Wenchao;YANG Hua;ZHANG Hao;CHEN Yujie;WANG Xue(Faculty of Information Science and Engineering Ocean University of China,Qingdao 266100,China;Ocean shortwave communication open studio of Qingdao Marine Science and technology pilot National Laboratory,Qingdao 266100,China)

机构地区：[1]中国海洋大学信息科学与工程学部,山东青岛266100 [2]青岛海洋科学与技术试点国家实验室海洋短波通信开放工作室,山东青岛266100

出　　处：《海洋湖沼通报》2024年第2期1-7,共7页Transactions of Oceanology and Limnology

基　　金：山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(2018SDKJ0210);国家自然科学基金(61701462、91938204、41527901)。

摘　　要：雷达系统的研究和开发一般要经过反复的试验,为解决实地测试浪费大量人力、物力的问题,本文建立了一个以海杂波为主的回波模拟器,用于雷达测试,降低成本。本文先在Elfouhaily谱基础上利用尖浪模型建立非线性动态海面,利用网格映像法将海面划分为不同的分辨单元。首次将网格化的海面与回波的后向散射特性相结合生成模拟回波,并且在模拟过程中提出了一种利用海浪特点对擦地角进行修正的算法。最后将模拟出的回波与实测和理论数据进行分析拟合,证明了模拟回波的有效性。The research and development of radar systems generally require repeated tests.In order to solve the problem of wasting a lot of manpower and material resources in field tests,this paper established an echo simulator mainly based on sea clutter,which was used for radar tests to reduce costs.Based on the Elfouhaily spectrum,the nonlinear dynamic sea surface was established by using the Choppy wave model,and the sea surface was divided into different resolution units by using the grid mapping method.This paper combined the gridded sea surface with the backscatter characteristics of the echo to generate a simulated echo for the first time.And in the simulation process,an algorithm for correcting the grazing angle based on the characteristics of the waves was proposed.Finally,the simulated echo was analyzed and fitted with the measured and theoretical data,which proved the effectiveness of the simulated echo.

关 键 词：海洋回波 非线性动态海面 后向散射系数 入射角修正 

分 类 号：TN955[电子电信—信号与信息处理]