Localization of marine seismic vibrator based on hyperbolic Radon transform

Tsubasa Kusano, Kohei Yatabe, Yasuhiro Oikawa

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    In marine seismic surveys to explore seafloor resources, the structure below the seafloor is estimated from the obtained sound waves, which are emitted by a marine seismic sound source and reflected or refracted between the layers below the seafloor. In order to estimate the structure below the seafloor from returned waves, information of the sound source position and the sound speed are needed. Marine seismic vibrators, which are one of the marine seismic sound sources, have some advantages such as high controllability of the frequency and phase of the sound, and oscillation at a high depth. However, when the sound source position is far from the sea surface, it becomes difficult to specify the exact position. In this paper, we propose a method to estimate the position of a marine seismic vibrator and the sound speed from obtained seismic data by formulating an optimization problem via hyperbolic Radon transform. Numerical simulations confirmed that the proposed method almost achieves theoretical lower bounds for the variances of the estimations.

    Original languageEnglish
    Pages (from-to)215-225
    Number of pages11
    JournalAcoustical Science and Technology
    Volume39
    Issue number3
    DOIs
    Publication statusPublished - 2018 Jan 1

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    Keywords

    • Functional approximation
    • Gradient-based optimization
    • Marine seismic survey
    • Seismic migration
    • Sound source localization

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

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