Trans-Dimensional Inversion of Modal Dispersion Data on the New England Mud Patch
| Autor: | Stan E. Dosso, Julien Bonnel, N. Ross Chapman, Dimitrios Eleftherakis |
|---|---|
| Přispěvatelé: | Woods Hole Oceanographic Institution (WHOI), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Mineralogy
Ocean Engineering 010502 geochemistry & geophysics 01 natural sciences Receivers Sediments [SPI]Engineering Sciences [physics] Speed of sound Sea measurements 0103 physical sciences Chirp Modal dispersion Electrical and Electronic Engineering Image warping 010301 acoustics Seabed 0105 earth and related environmental sciences New England mud patch Mechanical Engineering Uncertainty warping seabed characterization experiment (SBCEX) Dispersion Data set Geoacoustic inversion underwater acoustics Modal Cascading style sheets Layering Geology |
| Zdroj: | IEEE Journal of Oceanic Engineering IEEE Journal of Oceanic Engineering, 2019, ⟨10.1109/JOE.2019.2896389⟩ |
| Popis: | International audience; 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 |
| Databáze: | OpenAIRE |
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