高频雷达海洋回波谱的数字模拟

Numerical Simulation for the Sea Echo Spectrum of HF Radar

根据Ｂａｒｒｉｃｋ导出的一阶和二阶高频雷达海洋回波截面方程，以二阶雷达截面方程为基础，在极坐标条件下，把参与散射的二维海浪波数空间分解为无数一维海浪波数空间之和，与之对应，并将二阶海洋回波谱的模拟转化为固定波数下二阶回波子谱的模拟，再将各二阶回波子谱叠加就得到完整的二阶海洋回波谱．这一算法避免了传统的回波谱模拟过程中需求解非线性方程──等频线方程的麻烦．文中给出的模拟结果与其它模拟算法结果相一致，提出的模拟算法简洁，编程简单，模拟结果的精度容易控制．运算速度大大提高．

Introduced Barrick's first-order and second-order sea echo section equations of HF radar. Based on the second-order section equation, this paper submits an algorithm to simulate the sea echoes spectrum of HF radar. In the polar coordinate,the method decomposes the sea wave-number space from two dimensions to one-dimension,and adds up the second-order spectrum from all one-dimension to form the whole second-order spectrum. The simulation algorithm is easy to program and has higher calculating speed. The simulated results are identification to ones with other methods.