基于交叉谱法的C波段机载SAR海浪反演  

Ocean wave retrieval from C band airborne SAR imagery based on cross spectra method

作　　者：刘文俊[1,2] 孔毅[1] 赵现斌[1] 陈曦[1] 徐成有 

机构地区：[1]解放军理工大学气象海洋学院 [2]解放军75822部队

出　　处：《解放军理工大学学报（自然科学版）》2014年第4期380-385,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41076188;41005018)

摘　　要：传统的初猜谱海浪反演方法,需要先使用海浪预报模式来获取初猜谱,其优劣直接影响着反演的精度。为了摆脱对初猜谱的依赖,在不需要先验信息的情况下实现海浪反演,提出了基于交叉谱法的海浪反演方案。该方案采用C波段全极化机载SAR探测数据,利用全极化信息反演海面风矢量,作为WVW算法的风场输入,再通过WVW算法获取海浪谱,进而提取海浪信息。研究结果表明,海浪反演精度得到显著提高,海浪传播180°模糊问题也得到了有效解决。该方案对机载SAR海浪反演业务化应用具有借鉴意义。The traditional first guess spectra wave retrieval method requires the first guess spectra firstly, which is taken from the numerical wave model. The quality of first guess spectra affects the accuracy of the retrieval. In or-der to get rid of the dependence on first guess spectra, to retrieve ocean wave in the case does not require a priori information. A scheme for airborne SAR wave retrieval was presented based on the cross spectra method. The C-band fully polarimetric airborne SAR sounding data were used to retrieve the ocean wind vectors, and regarded as the input of the wind field part of WVW algorithm, and then the WVW algorithm was used to get the ocean wave spectrum and the wave information. The results show that the wave retrieval accuracy is significantly improved, and the problem about the ambiguity of the waves spread direction is also effectively solved. This scheme is useful to airborne SAR wave retrieval operational application.

关 键 词：交叉谱法 海浪反演 交叉谱准线性算法 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]