多波束海底地形畸变校正与声速剖面反演

发布时间：2018-01-09 20:06

本文关键词：多波束海底地形畸变校正与声速剖面反演　出处：《武汉大学学报(信息科学版)》2016年03期 　论文类型：期刊论文

【摘要】：提出了一种多波束测量声速剖面反演方法。即采用EOF(empirical orthogonal function)算法,对测区实测声速剖面数据进行模态向量提取,以多波束测量声速改正不完善引起的地形畸变程度为依据构造适应度函数,通过遗传算法优化声速剖面的重构系数,实现声速剖面反演。实验结果表明,反演的声速剖面能有效改正声速误差引起的海底地形失真,显著提高了多波束水深测量数据精度和处理效率。
[Abstract]:In this paper, a multi-beam measurement method for acoustic velocity profile inversion is proposed, which is based on EOF(empirical orthogonal function algorithm. The modal vector is extracted from the measured data of sound velocity profile, and the fitness function is constructed on the basis of the degree of terrain distortion caused by the imperfect correction of sound velocity in multi-beam measurement. The reconstruction coefficient of the sound velocity profile is optimized by genetic algorithm to realize the inversion of the sound velocity profile. The experimental results show that the inversion velocity profile can effectively correct the seabed terrain distortion caused by the sound velocity error. The precision and processing efficiency of multi-beam bathymetric measurement are improved significantly.
【作者单位】： 91550部队;大连舰艇学院海洋测绘系;
【基金】：国家自然科学基金(41074002) 国家863计划(2009AA121402-4)~~
【分类号】：P229
【正文快照】： 声速剖面采样是多波束测深过程中测区声速信息的主要获取方式。目前,我国声速剖面站的布设时间均是一天内水温变化的极值点附近(每天的早晨8点、中午2点和晚上8点),声速剖面改正主要采用时间就近原则[1],由于声速剖面在时间上和空间上的可变性[2],采用以上方法进行声速改正必

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