An improved algorithm based on equivalent sound velocity profile method at large incident angle

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

doi:10.1007/s13131-023-2261-z

Volume 43 Issue 2

Feb. 2024

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Article Navigation > Acta Oceanologica Sinica > 2024 > 43(2): 161-167

Qianqian Li, Qian Tong, Fanlin Yang, Qi Li, Zhihao Juan, Yu Luo. An improved algorithm based on equivalent sound velocity profile method at large incident angle[J]. Acta Oceanologica Sinica, 2024, 43(2): 161-167. doi: 10.1007/s13131-023-2261-z

Citation:

Qianqian Li, Qian Tong, Fanlin Yang, Qi Li, Zhihao Juan, Yu Luo. An improved algorithm based on equivalent sound velocity profile method at large incident angle[J]. Acta Oceanologica Sinica, 2024, 43(2): 161-167. doi: 10.1007/s13131-023-2261-z

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An improved algorithm based on equivalent sound velocity profile method at large incident angle

doi: 10.1007/s13131-023-2261-z

Qianqian Li^{1, 2},
Qian Tong¹,
Fanlin Yang¹,
Qi Li¹,
Zhihao Juan¹,
Yu Luo^{1
,
,}

1.
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
2.
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China

Funds: The Natural Science Foundation of Shandong Province of China under contract Nos ZR2022MA051 and ZR2020MA090; the National Natural Science Foundation of China under contract No. U22A2012; China Postdoctoral Science Foundation under contract No. 2020M670891; the SDUST Research Fund under contract No. 2019TDJH103; the Talent Introduction Plan for Youth Innovation Team in universities of Shandong Province (innovation team of satellite positioning and navigation).

More Information

Corresponding author: E-mails: luoyu@sdust.edu.cn
Received Date: 2023-01-03
Accepted Date: 2023-08-21

Available Online: 2024-03-08

Publish Date: 2024-02-01

Abstract

Abstract

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 profile,
- ray tracing method,
- large incident angle,
- edge beam,
- deep sea,
- error correction,
- multibeam echo-sounder system

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References(16)

References

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