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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 74 for “"Ocean bottom"”.
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Ocean bottom seismic scattering
Seismic studies of the oceanic crust, both experimental and theoretical, often assume a flat seafloor and laterally homogeneous crust. This is done regardless of the appearance in seismic data of obvious effects due to scattering from lateral heterogeneities both on and in the seafloor. Detailed …
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Ocean bottom seismic scattering
… and Planetary Sciences, and Woods Hole Oceanographic Institution, 1990.
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Ocean bottom sediments off the mid-Atlantic coast
Made available in DSpace on 2017-11-30T21:01:06Z (GMT). No. of bitstreams: 2 6464156.pdf: 13674213 bytes, checksum: c42374a3ccacf4839d4da431ec398b12 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1937
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Acoustic wave scattering from a random ocean bottom
… Institute of Technology, Dept. of Ocean Engineering, and Woods Hole Oceanographic Institution, 1991.
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Imaging of large offset ocean bottom seismic data
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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The acoustical transmission response of an ocean bottom sedimentary layer.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
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Bistatic scattering of acoustic waves from a rough ocean bottom
… Institute of Technology, Dept. of Ocean Engineering, 1997.
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Exact reconstruction of ocean bottom velocity profiles from monochromatic scattering data
… determination of the acoustic parameters of the ocean bottom using a monochromatic source. The problem is shown to be equivalent to that of the reconstruction of the potential in a Schrodinger equation from the knowledge of the plane-wave reflection coefficient as a function of vertical …
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Cooperative localisation in underwater robotic swarms for ocean bottom seismic imaging.
… and ecological research, and samples collection. Ocean-bottom seismic surveys are vital for oil and gas exploration, and for productivity enhancement of an existing production facility. Ocean-bottom seismic sensors are deployed on the seabed to acquire those surveys. Node deployment methods used …
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Seismicity and structure of the Orozco transform fault from ocean bottom seismic observations
… of the data were collected by a network of 29 ocean bottom seismometers (OBS) and hydrophones (OBH) which were deployed as part of project ROSE (Rivera Ocean Seismic Experiment). Additional information is provided by magnetic anomaly and bathymetric data collected during and prior to ROSE and …
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Algorithm for computation of the acoustic plane-wave reflection coefficient of the ocean bottom
… wave incident on a horizontally stratified ocean bottom, the reflected pressure field and the plane-wave reflection coefficient are related through a two-dimensional spatial-wavenumber Fourier transform. An algorithm is proposed to evaluate the plane-wave reflection coefficient from the …
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Investigating blue and fin whale populations through passive acoustic monitoring using ocean bottom seismometers
… continuous data on a large spatial scale. Ocean bottom seismometers (OBSs), geophysical instruments used to study earthquakes through recording ground motion, are opportunistic PAM sensors that record large baleen whale calls. There are large amounts of publicly available OBS data, but …
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A modal/WKB inversion method for determining sound speed profiles in the ocean and ocean bottom
Two approaches to determining the ocean sound speed profile using measured acoustic modal eigenvalues are examined. Both methods use measured eigenvalues and mode dependent assumed values of the WKB phase integral as input data and use the WKB phase integral as a starting point for relating the …
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
… direct effect on the propagation of sound in the ocean. In the frequency range of interest (50 - 500 Hz) the sediment can be modelled as a fluid. Assuming horizontal stratification of the ocean bottom, the acoustic parameters of interest are the compressional wave speed, the compressional wave …
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
… Institute of Technology, Dept. of Ocean Engineering, 1985.
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The numerical synthesis and inversion of acoustic fields using the Hankel transform with application to the estimation of the plane wave reflection coefficient of the ocean bottom
… acoustic response of a horizontally stratified ocean bottom. It is an integral step in the inversion of acoustic field measurements to obtain parameters of the bottom and it is used to characterize an environment for purposes of acoustic imaging. This thesis studies both the generation of …
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The numerical synthesis and inversion of acoustic fields using the Hankel transform with application to the estimation of the plane wave reflection coefficient of the ocean bottom
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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The Mechanisms and Triggering of Earthquakes in the Ridge-Transform Environment
… plate boundaries, however, are beneath our oceans making data collection, the key to furthering our knowledge about these zones, difficult. Recent advances in research vessels, seismic data acquisition techniques, and equipment built to withstand the temperatures and pressures within the …
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Radiation and dissipation of internal waves generated by geostrophic motions impinging on small-scale topography
… turbulent mixing is enhanced in the Southern Ocean in regions above rough topography. The enhancement extends 1 km above the topography suggesting that mixing is supported by breaking of gravity waves radiated from the ocean bottom. In other regions, gravity wave radiation by bottom topography …
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Radiation and dissipation of internal waves generated by geostrophic motions impinging on small-scale topography
… turbulent mixing is enhanced in the Southern Ocean in regions above rough topography. The enhancement extends 1 km above the topography suggesting that mixing is supported by breaking of gravity waves radiated from the ocean bottom. In other regions, gravity wave radiation by bottom topography …
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