海洋测深中凸形海底测量数据失真与改正  

Gibbous Seafloor Survey Data Distortion and Correction in Bathymetric

作　　者：邹永刚[1] 刘雁春[1] 夏伟[1] 肖付民[1] 

机构地区：[1]海军大连舰艇学院海测工程系,辽宁大连116018

出　　处：《测绘科学技术学报》2009年第6期418-421,425,共5页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金资助项目(40671161)

摘　　要：在海洋测深中,由于回声测深仪波束角效应的影响,对凸形海底的测量会带来较大的失真。在数学意义上推证了波束角效应在凸形海底地形的作用规律与海底地形是否连续可导有关,结合测深仪的测量机制和海底底质对声波反射特点,在物理意义上分析了实际测量中波束角效应的影响为近似"双曲线增伪效应"。针对波束角效应改正中出现的定位点错位问题,提出了凸形海底地形波束角效应改正模型的补充原则,能够较好地处理改正后定位点错位的问题。The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain. Beam-width effect has great relationship with the continuous and derivative of seafloor in mathematics. Coupled survey principle of echo-sounder with the peculiarity of bottom characteristics to sound wave, the beam-width effect on gibbous terrain has been proved to approximate the hyperbolic extension effect. A supplement principle of beam-width effect correction algorithm for gibbous terrain distorted was put forward, which has good behave on position coordinate disarray.

关 键 词：海洋测深 波束角效应 凸形海底 定位点错位 双曲线增伪效应 

分 类 号：P229.1[天文地球—大地测量学与测量工程]