Time series prediction of shallow water sound speed profile in the presence of internal solitary wave trains

Article Engineering, Marine

A Novel Sound Speed Profile Prediction Method Based on the Convolutional Long-Short Term Memory Network

Bingyang Li et al.

Summary: Sound velocity is an important parameter that affects sound propagation in the ocean. Accurate acquisition of sound speed profiles (SSP) is crucial for marine surveying and underwater wireless communication. Researchers propose a Conv-LSTM neural network that utilizes historical data to predict the complete SSP. Experimental results show that Conv-LSTM performs better than LSTM network in predicting SSP time series.

JOURNAL OF MARINE SCIENCE AND ENGINEERING (2022)

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Article Remote Sensing

Inversion of ocean sound speed profiles from travel time measurements using a ray-gradient-enhanced surrogate model

Dajun Sun et al.

Summary: This study proposes a novel method, the Ray-Gradient-Enhanced Surrogate Model (RGE-SM), for the inversion of Sound Speed Profiles (SSPs). By matching the predicted acoustic travel times with the measured ones, the RGE-SM method aims to find the global solution of SSP parameters. The results show that the RGE-SM method outperforms the genetic algorithm in terms of estimation error and calculation time.

REMOTE SENSING LETTERS (2022)

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Article Engineering, Marine

Analysis of Underwater Acoustic Propagation under the Influence of Mesoscale Ocean Vortices

Sartaj Khan et al.

Summary: This study identified mesoscale vortex in the South China Sea using AIPOcean data and extracted characteristic parameters using the Okubo-Weiss method. A theoretical model based on the Gaussian method was established to fit and simulate the vortex parameters and analyze the influence on sound propagation. The results showed different effects of cold and warm vortices on underwater sound propagation, with the stronger mesoscale vortices having a greater impact on the sound field.

JOURNAL OF MARINE SCIENCE AND ENGINEERING (2021)

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Article Acoustics