In-layer equivalent two-segment line substitution method for sound velocity profile considering area difference

doi:10.11947/j.AGCS.2023.20210342

Abstract

Abstract: Sound velocity profile is an important parameter in multi-beam sounding system. In this paper, an adaptive layering optimization method of sound velocity profile considering the area difference between layers is proposed, which is the in-layer equivalent two-segment line substitution method. Based on the method of maximum acoustic velocity offset, a calculation model of the equivalent two-segment line in the optimal layer is constructed through model analysis and derivation. The algorithm is validated by using measured multi-beam sounding data. The results show that this method can control the percentage of standard deviation of water depth between the whole water depth data and the interlayer water depth data within 1%. Because the method can accurately calculate the sound velocity of complex multilayer seawater, it has important engineering application value in high precision measurement of special seabed topography with large fluctuation.

Key words: sound velocity profile, multi-beam sounding data, simplification of sound velocity profile, in-layer equivalent two-segment line substitution method, equivalent area difference

CLC Number:

P229

XIAO Yuanbi, PENG Rencan, DONG Jian, MA Zhengwei, LIU Ju. In-layer equivalent two-segment line substitution method for sound velocity profile considering area difference[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(12): 2028-2038.

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