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Time-angle sensitivity kernels for sound-speed perturbations in a shallow ocean

التفاصيل البيبلوغرافية
العنوان: Time-angle sensitivity kernels for sound-speed perturbations in a shallow ocean
المؤلفون: Barbara Nicolas, Florian Aulanier, Philippe Roux, Jerome Mars
المساهمون: GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Ondes et Structures, Institut des Sciences de la Terre (ISTerre), Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement [IRD] : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), ISTERRE, OSUG, Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)
المصدر: Journal of the Acoustical Society of America
Journal of the Acoustical Society of America, Acoustical Society of America, 2013, 134 (1), pp.88-96. ⟨10.1121/1.4809650⟩
Journal of the Acoustical Society of America, 2013, 134 (1), pp.88-96. ⟨10.1121/1.4809650⟩
بيانات النشر: HAL CCSD, 2013.
سنة النشر: 2013
مصطلحات موضوعية: shallow-water waveguide, Acoustics and Ultrasonics, PACS number(s): 43.30.Pc, 43.60.Fg, 43.60.Pt [SED], Acoustics, Context (language use), double-beamforming algorithm, time-angle sensitivity kernels, 01 natural sciences, Signal, sound-speed perturbations, 03 medical and health sciences, 0302 clinical medicine, Arts and Humanities (miscellaneous), [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0103 physical sciences, Waveguide (acoustics), direction of departure (DOD), 14. Life underwater, Sensitivity (control systems), 030223 otorhinolaryngology, 010301 acoustics, Shallow water equations, Physics, direction of arrival (DOA), Direction of arrival, Acoustic wave, source-receiver arrays, Acoustic waves, travel time, Launch angle, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
الوصف: International audience; Acoustic waves traveling in a shallow-water waveguide produce a set of multiple paths that can be characterized as a geometric approximation by their travel time (TT), direction of arrival (DOA), and direction of departure (DOD). This study introduces the use of the DOA and DOD as additional observables that can be combined to the classical TT to track sound-speed perturbations in an oceanic waveguide. To model the TT, DOA, and DOD variations induced by sound-speed perturbations, the three following steps are used: (1) In the first-order Born approximation, the Fr echet kernel provides a linear link between the signal fluctuations and the sound-speed perturbations; (2) a double-beamforming algorithm is used to transform the signal fluctuations received on two source-receiver arrays in the time, receiver-depth, and source-depth domain into the eigenray equivalent measured in the time, reception-angle and launch angle domain; and finally (3) the TT, DOA, and DOD variations are extracted from the double-beamformed signal variations through a first-order Taylor development. As a result, time-angle sensitivity kernels are defined and used to build a linear relationship between the observable variations and the sound-speed perturbations. This approach is validated with parabolic-equation simulations in a shallow-water ocean context.
اللغة: English
تدمد: 0001-4966
1520-8524
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fab133ab018153f9ad0ab57c7e0c321b
https://hal.archives-ouvertes.fr/hal-00853765/document
حقوق: OPEN
رقم الأكسشن: edsair.doi.dedup.....fab133ab018153f9ad0ab57c7e0c321b
قاعدة البيانات: OpenAIRE
الوصف
تدمد:00014966
15208524