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Ranging in an Underwater Medium with Multiple Isogradient Sound Speed Profile Layers [PDF]
Sensors, 2012 In this paper, we analyze the problem of acoustic ranging between sensor nodes in an underwater environment. The underwater medium is assumed to be composed of multiple isogradient sound speed profile (SSP) layers where in each layer the sound speed is ...
Hamid Ramezani, Geert Leus
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Compressive Sound Speed Profile Inversion Using Beamforming Results
Remote Sensing, 2018 Sound speed profile (SSP) significantly affects acoustic propagation in the ocean. In this work, the SSP is inverted using compressive sensing (CS) combined with beamforming to indicate the direction of arrivals (DOAs). The travel times and the positions
Youngmin Choo, Woojae Seong
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A Method for Sound Speed Profile Prediction Based on CNN-BiLSTM-Attention Network
Journal of Marine Science and EngineeringIn response to the current challenges in efficiently acquiring sound speed profiles and ensuring their representativeness, considering the need to fully leverage historical sound speed profiles while accounting for their spatiotemporal variability, we ...
Zhang Wei +5 more
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Journal of Marine Science and EngineeringThe speed of sound in seawater plays a crucial role in determining the accuracy of multibeam bathymetric measurements. In deep-sea multibeam measurements, the challenge of inadequate longitudinal coverage of sound speed profiles arises from variations in
Wei Zhang +4 more
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Modeling sound speed profile based on ocean normal mode
Frontiers in Marine ScienceIntroductionStatistical methods such as empirical orthogonal functions (EOFs) are often used to model the sound speed profile (SSP). However, their statistical nature often leads to the sample dependence and physical fuzziness.MethodThis study proposes a
Ke Qu +3 more
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A New Compression and Storage Method for High-Resolution SSP Data Based-on Dictionary Learning
Journal of Marine Science and Engineering, 2022 The sound speed profile data of seawater provide an important basis for carrying out underwater acoustic modeling and analysis, sonar performance evaluation, and underwater acoustic assistant decision-making.
Kaizhuang Yan +2 more
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Reconstruction Method of Ocean Front Model Based on Fuzzy Cluster Analysis of Sound Speed Profile
IEEE Access, 2021 Ocean fronts are mostly determined according to the horizontal temperature gradient, and various selection criteria may lead to different frontal zones. This study proposes a frontal zone delineation method based on sound speed profile.
Yuyao Liu +5 more
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Frontiers in Marine Science, 2023 IntroductionThe trend of sound speed profile (SSP) inversion is towards wide-area sound speed estimation. However, the traditional inversion method of dividing the latitude and longitude grids has limitations in terms of significantly lower accuracy when
Chen Liu, Ke Qu
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Influence of Range-Dependent Sound Speed Profile on Position of Convergence Zones
Remote Sensing, 2022 Based on the Wentze–Kramers–Brillouin approximation, we derive formulae to calculate the position of convergence zones in a range-dependent environment with sound speed profiles varying in linear and ellipsoidal Gaussian eddy cases.
Ziyang Li +3 more
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Energies, 2021 The accuracy of multibeam echosounder bathymetric measurement depends on the accuracy of the data of the sound speed layers within the water column. This is necessary for the correct modeling of ray bending.
Karolina Zwolak +7 more
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