首页|An improved algorithm based on equivalent sound velocity pro-file method at large incident angle

An improved algorithm based on equivalent sound velocity pro-file method at large incident angle

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With the development of ultra-wide coverage technology,multibeam echo-sounder(MBES)system has put forward higher requirements for localization accuracy and computational efficiency of ray tracing method.The classical equivalent sound speed profile(ESSP)method replaces the measured sound velocity profile(SVP)with a simple constant gradient SVP,reducing the computational workload of beam positioning.However,in deep-sea environment,the depth measurement error of this method rapidly increases from the central beam to the edge beam.By analyzing the positioning error of the ESSP method at edge beam,it is discovered that the positioning error increases monotonically with the incident angle,and the relationship between them could be expressed by polynomial function.Therefore,an error correction algorithm based on polynomial fitting is obtained.The simulation experiment conducted on an inclined seafloor shows that the proposed algorithm exhibits comparable efficiency to the original ESSP method,while significantly improving bathymetry accuracy by nearly eight times in the edge beam.

equivalent sound speed profileray tracing methodlarge incident angleedge beamdeep seaerror correctionmultibeam echo-sounder system

Qianqian Li、Qian Tong、Fanlin Yang、Qi Li、Zhihao Juan、Yu Luo

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

College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China

Natural Science Foundation of Shandong Province of ChinaNatural Science Foundation of Shandong Province of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationSDUST Research FundTalent Introduction Plan for Youth Innovation Team in universities of Shandong Province

ZR2022MA051ZR2020MA090U22A20122020M6708912019TDJH103

2024

10.1007/s13131-023-2261-z

海洋学报(英文版)
中国海洋学会

海洋学报(英文版)

CSTPCD
影响因子：0.323
ISSN：0253-505X
年,卷(期)：2024.43(2)
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