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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2013

Shallow water acoustic tomography from angle measurements instead of travel-time measurements

Barbara Nicolas
Jerome I. Mars
Philippe Roux
Romain Brossier

Résumé

For shallow-water waveguides and mid-frequency broadband acoustic signals, ocean acoustic tomography (OAT) is based on the multi-path aspect of wave propagation. Using arrays in emission and reception and advanced array processing, every acoustic arrival can be isolated and matched to an eigenray that is defined not only by its travel time but also by its launch and reception angles. Classically, OAT uses travel-time variations to retrieve sound-speed perturbations; this assumes very accurate source-to-receiver clock synchronization. This letter uses numerical simulations to demonstrate that launch-and-reception-angle tomography gives similar results to travel-time tomography without the same requirement for high-precision synchronization.
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Dates et versions

hal-00874955 , version 1 (19-10-2013)

Identifiants

Citer

Florian Aulanier, Barbara Nicolas, Jerome I. Mars, Philippe Roux, Romain Brossier. Shallow water acoustic tomography from angle measurements instead of travel-time measurements. Journal of the Acoustical Society of America, 2013, 134, pp.EL373. ⟨10.1121/1.4820468⟩. ⟨hal-00874955⟩
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