首页|An improved positioning model of deep-seafloor datum point at large incidence angle

An improved positioning model of deep-seafloor datum point at large incidence angle

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
The inhomogeneous sound speed in seawater causes refraction of sound waves,and the elimination of the refraction effect is essential to the accuracy of underwater acoustic positioning.The ray-tracing method is an indispensable tool for effectively handling problems.However,this method has a conflict between localization accuracy and computational quantity.The equivalent sound speed profile(ESSP)method uses a simple sound speed profile(SSP)instead of the actual complex SSP,which can improve positioning precision but with residual error.The residual error is especially non-negligible in deep water and at large beam incidence angles.By analyzing the residual error of the ESSP method through a simulation,an empirical formula of error is presented.The data collected in the sailing circle mode(large incidence angle)of the South China Sea are used for verification.The experiments show that compared to the ESSP method,the improved algorithm has higher positioning precision and is more efficient than the ray-tracing method.

underwater acoustic positioningseafloor datum pointslarge incident angleequivalent sound speed profile(ESSP)deep water

Qianqian LI、Shoulian CAO、Fanlin YANG、Yu LUO、Qian TONG

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College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150000,China

College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,China

Key Laboratory of Ocean Geomatics,Ministry of Natural Resources,Qingdao 266590,China

Natural Science Foundation of Shandong Province of ChinaChina Postdoctoral Science FoundationSDUST Research Fund

ZR2022MA0512020M6708912019TDJH103

2024

10.1007/s00343-023-2380-6

海洋湖沼学报(英文版)
中国海洋湖沼学会

海洋湖沼学报(英文版)

CSTPCD
影响因子：0.386
ISSN：2096-5508
年,卷(期)：2024.42(1)
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