Trans-Dimensional Inversion of Modal Dispersion Data on the New England Mud Patch - ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne Accéder directement au contenu
Article Dans Une Revue IEEE Journal of Oceanic Engineering Année : 2019

Trans-Dimensional Inversion of Modal Dispersion Data on the New England Mud Patch

Résumé

This paper presents single receiver geoacoustic inversion of two independent data sets recorded during the 2017 seabed characterization experiment on the New England Mud Patch. In the experimental area, the water depth is around 70 m, and the seabed is characterized by an upper layer of fine grained sediments with clay (i.e., mud). The first data set considered in this paper is a combustive sound source signal, and the second is a chirp emitted by a J15 source. These two data sets provide differing information on the geoacoustic properties of the seabed, as a result of their differing frequency content, and the dispersion properties of the environment. For both data sets, source/receiver range is about 7 km, and modal time-frequency dispersion curves are estimated using warping. Estimated dispersion curves are then used as input data for a Bayesian trans-dimensional inversion algorithm. Subbottom layering and geoacoustic parameters (sound speed and density) are thus inferred from the data. This paper highlights important properties of the mud, consistent with independent in situ measurements. It also demonstrates how information content differs for two data sets collected on reciprocal tracks, but with different acoustic sources and modal content. OAPA

Dates et versions

hal-02434613 , version 1 (10-01-2020)

Identifiants

Citer

Julien Bonnel, S.E. Dosso, Dimitrios Eleftherakis, N.Ross Chapman. Trans-Dimensional Inversion of Modal Dispersion Data on the New England Mud Patch. IEEE Journal of Oceanic Engineering, 2019, ⟨10.1109/JOE.2019.2896389⟩. ⟨hal-02434613⟩
16 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More