利用多波束反向散射强度角度响应曲线的底质特征参数提取算法  

A Method for Extracting Seabed Feature Parameters Based on the Angular Response Curve of Multibeam Backscatter Strength

作　　者：金绍华[1] 肖付民[1] 边刚[1] 王沫[1] 孙文川[1] 

机构地区：[1]海军大连舰艇学院海洋与测绘科学系,辽宁大连116018

出　　处：《武汉大学学报（信息科学版）》2014年第12期1493-1498,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41074002)~~

摘　　要：提出了一种基于多波束反向散射强度角度响应曲线的底质特征参数提取算法。根据多波束单ping反向散射强度数据的变化规律,给出了获取平均反向散射强度角度响应曲线的ping数确定方法;分析角度响应曲线与底质类型的相关性,由于曲线上残留误差难以消除,采用容差性强的非线性最小二乘拟合算法,结合Hellequin参数模型,提取底质相关特征参数。实例计算结果表明,提取的特征参数在抑制多波束海底反向散射强度误差影响的基础上,有效保留了底质类型相关的反向散射强度随入射角变化信息,保证了多波束海底底质分类的能力及可靠性。A method for extracting seabed feature parameters is proposed based on the angular response curve of the multibeam backscatter strength.Based on the change rule of backscatter strength for one ping,the determining method of the number of the pings has been put forward which was included in the obtaining of the angular response curve of the mean backscatter strength.The relationship between angular response curve and seabed is analyzed,and using non-least squares fitting method combine Hellequin parameters model to extract seabed feature parameters.The results show that the extracted feature parameters can suppress backscatter strength error and reserve change information of backscatter strength with incidence angle,and improve capability and reliability of multibeam seabed classification.

关 键 词：多波束 海底反向散射强度 角度响应曲线 非线性最小二乘拟合 海底底质分类 

分 类 号：P229[天文地球—大地测量学与测量工程]