2019_programme: GRADIENT OF THE COST FUNCTION VIA THE ADJOINT METHOD FOR UNDERWATER ACOUSTIC INVERSION

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  • Session: 24. Inversion methods in underwater acoustics
    Organiser(s): N/A
  • Lecture: GRADIENT OF THE COST FUNCTION VIA THE ADJOINT METHOD FOR UNDERWATER ACOUSTIC INVERSION
    Paper ID: 1211
    Author(s): Papadakis John, Karasmani Eftychia
    Presenter: Karasmani Eftychia
    Presentation type: oral
    Abstract: The acoustic propagation problem in the ocean is modeled via the wide angle parabolic equation with a Neumann to Dirichlet map bottom boundary condition. An environment consisting of the water column, a sediment layer and the semi-infinite sub-bottom region is considered. The derivatives of a new cost function with respect to the unknown environmental parameters are calculated analytically via the adjoint operator and incorporated numerically in an inversion scheme. Full geoacoustic inversion for eight bottom parameters is performed successfully, using experimental field data from the Yellow Shark experiment, for the first time according to the authors' knowledge.
  • Corresponding author: Dr Karasmani Eftychia
    Affiliation: Institute of Applied and Computational Mathematics, FORTH
    Country: Greece
    e-mail:

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