基于双基地海洋回波谱仿真数据的海浪波数谱反演  

Inversion of Wave-number Spectrum from Simulated Bistatic High-frequency Radar Data

作　　者：何缓[1,2] 柯亨玉[1] 万显荣[1] 耿方志[2] 

机构地区：[1]武汉大学电子信息学院,武汉430079 [2]空军雷达学院信息对抗系,武汉430019

出　　处：《电子与信息学报》2011年第10期2477-2482,共6页Journal of Electronics & Information Technology

基　　金：国家863计划项目(2009AA12Z125)资助课题

摘　　要：该文首次基于微扰法导出的非后向散射系数及在此基础上得到的双基地海洋回波谱仿真数据,采用Howell算法进行海浪波数谱的反演以及有效波高和风速信息的提取。文中补充了Howell算法应满足的条件,明确了Howell算法中矩阵奇异值个数r的选择原则。反演结果表明,风向趋于90时,有效波高和风速反演误差会减小;根据不同海态(风速或有效波高)选择合适的工作频率可减小反演误差。在工作频率和矩阵奇异值个数选择合适时,有效波高反演误差小于3%,风速反演误差小于1%。Based on the bistatic scattering coefficients deduced from perturbation method and the simulated data of bistatic sea echo spectrum, Howell’s algorithm is adopted to derive the wave-number spectrum and to extract the information of significant wave height and wind speed. In this paper, the applicable condition of Howell’s algorithm is complemented. The selection principle of the retained number of singular values of the kernel matrix is determined. Inversion results show that the inversion errors of significant wave height and wind speed decrease as the wind direction tends to perpendicular. And the inversion errors also decrease as the appropriate operating frequency is selected according to the sea state （i.e. wind speed or significant wave height）. If the operating frequency and the retained number of singular values of the kernel matrix are appropriate, the inversion error of significant wave height will be less than 3% and the inversion error of wind speed will be less than 1%.

关 键 词：双基地高频地波雷达 非后向散射系数 海洋回波谱 海浪波数谱 反演 

分 类 号：TN958[电子电信—信号与信息处理]