海面浪高参数的数值模拟与反演

摘要

In order to obtain the sea wave height parameter information,the radar first-order and second-order cross section equations of the narrow beam corresponding to certain wave spectrum were introduced.Since single radar provided only vague information,with the aid of bistatic radars,the fuzzy problem may be solved.Setting the sea wind speed,the radar working frequency,the intersection angles between the directions of two radar beams and the wind direction,using radar cross section of the narrow beam equation,the normalized sea clutter Doppler spectrum was simulated.By using the inversed wavehight spectrum,and with the definition of significant waveheight,the significant waveheight was calculated.The simulation results show that bistatic radars can reduce the error caused by different wind-directions.%为了获取海面浪高参数信息,引入一定海浪谱下的窄波束雷达一阶、二阶截面方程;利用双站雷达解决单站雷达只能提供模糊的海浪方向信息这一问题;设定海风速度、雷达工作频率以及2部雷达波束和风向的夹角,使用窄波束的雷达截面方程模拟归一化的海面回波Doppler谱;用其反演的幅度谱,借助有效浪高概念,计算出有效浪高.模拟结果显示,双站雷达可以减小因风向不同而带来的误差.