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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2023

Ship detection and tracking from single ocean-bottom seismic and hydroacoustic stations

Résumé

We report in this study how ocean-bottom seismometers (OBS) can be used as passive sonars to automatically detect, localize, and track moving acoustic sources at the ocean surface. We developed single-station methods based on direction of arrival and on multi-path interference measurements capable of handling continuous erratic signals emitted by ships. Based on a Bayesian mathematical framework, we developed an azimuthal detector and a radial detector and combined them into a fully automatic tracker. We tested the developed algorithm on seismic and hydroacoustic data recorded in the Indian Ocean by an OBS deployed at 4300 m depth, 200 km west of La R eunion Island. We quantified the performances using archives of commercial-vessel trajectories in the area provided by the Automatic Identification System. Detectors demonstrate capabilities in the detection range up to 100 km from the OBS with azimuthal accuracies of a few degrees and with distance accuracies of a few hundred of meters. We expect the method to be easily transposed to any other kind of sources (such as marine mammals).
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Dates et versions

hal-04019952 , version 1 (08-03-2023)

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Alister Trabattoni, Guilhem Barruol, Richard Dréo, Abdel Boudraa. Ship detection and tracking from single ocean-bottom seismic and hydroacoustic stations. Journal of the Acoustical Society of America, 2023, 153, pp.260 - 273. ⟨10.1121/10.0016810⟩. ⟨hal-04019952⟩
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