Shallow water acoustic tomography from angle measurements instead of travel-time measurements
AULANIER ; NICOLAS ; MARS ; ROUX ; BROSSIER
Type de document
ARTICLE A COMITE DE LECTURE REPERTORIE DANS BDI (ACL)
Langue
anglais
Auteur
AULANIER ; NICOLAS ; MARS ; ROUX ; BROSSIER
Résumé / Abstract
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.
Source
Journal of the Acoustical Society of America (The), num. 134, ELN373 p.
Editeur
ACOUSTICAL SOCIETY OF AMERICA
