title: Target localization through a data-based sensitivity kernel: a perturbation approach applied to a multistatic configuration.
abstract: A method to isolate the forward scattered field from the incident field on an object in a complex environment is developed for the purpose of localization. The method is based on a finite-frequency perturbation approach, through the measurement of a data-based sensitivity kernel. Experimental confirmation of the method is obtained using a cylindrical tank and an aggregate of ping-pong balls as targets surrounded by acoustic sources and receivers in a multistatic configuration. The spatial structure of the sensitivity kernel is constructed from field data for the target at a sparse set of positions, and compared with the expected theoretical structure. The localization of one or a few targets is demonstrated using the direct-path only. The experimental observations also show that the method benefits from including later arrivals from the tank wall and the bottom/surface reverberation, which indeed enhance the localization.
authors.affiliation: Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238.
authors.forename: Selda
authors.initials: S
authors.lastname: Yildiz
authors.affiliation: Institut des Sciences de la Terre, Universite Joseph Fourier, CNRS UMR 5275, 1381 rue de la Piscine, Grenoble 38041, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Roux
authors.affiliation: Laboratory for Mechanics and Acoustics, Aix Marseille Universite, CNRS UPR 7051, 31 Chemin Joseph-Aiguier 13402 Marseille, France.
authors.forename: Sandrine T
authors.initials: ST
authors.lastname: Rakotonarivo
authors.affiliation: Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238.
authors.forename: Christian
authors.initials: C
authors.lastname: Marandet
authors.affiliation: Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238.
authors.forename: W A
authors.initials: WA
authors.lastname: Kuperman