基于HY-2高度计波形数据的高分辨率有效波高反演算法研究  

Research on inversion algorithm of significant wave height with high resolution based on waveform data from HY-2 altimeter

作　　者：王桂忠[1] 张杰[2] 苗洪利[1] 李国强[1] 王鑫[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《中国工程科学》2014年第6期60-64,共5页Strategic Study of CAE

基　　金：国家自然科学基金项目(41176157)

摘　　要：有效波高是描述海况的重要参量之一,利用高度计遥感获取有效波高已在海洋研究中获得广泛应用。本文基于海洋二号(HY-2)卫星高度计波形数据,发展了一种高分辨率有效波高反演算法,采用中误差对反演得到的20 Hz有效波高进行筛选,有效提高了测量精度。通过该方法对1个轨的波形数据进行有效波高反演,统计结果表明:与针对1 s回波反演的有效波高比较,利用该方法可将有效波高观测分辨率提高约15倍,精度约为0.44 m;利用HY-2高度计20 Hz波形数据反演的有效波高精度可靠,可用其进行高分辨率的相关海洋研究。Significant wave height （SWH） is one of the important parameters which describe the sea state. The SWH derived from altimeter has been widely applied in marine research. Based on waveform data from HY-2 altimeter,we developed an inversion algorithm of SWH with high resolution. The root mean square error （RMSE） condition was used to improve the accuracy of 20 Hz SWH. By applying this method in the waveform data of one pass,the result showed that the inversion algorithm is effective. Compared with the SWH derived from 1 s waveform,the spatial and temporal resolution of the SWH derived by this method could be increased by about 15 times and the accuracy is about 0.44 m. The SWH derived from HY-2 altimeter 20 Hz waveform is reliable and could be applied for high resolution marine research.

关 键 词：HY-2 有效波高 反演算法 高分辨率 

分 类 号：P731.22[天文地球—海洋科学] P228.3