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dc.contributor.advisorGibson, Richard L. Jr.
dc.creatorLee, Kyoung-Jin
dc.date.accessioned2006-08-16T19:02:52Z
dc.date.available2006-08-16T19:02:52Z
dc.date.created2005-05
dc.date.issued2006-08-16
dc.identifier.urihttp://hdl.handle.net/1969.1/3771
dc.description.abstractUnderstanding and modeling seismic wave propagation is important in regional and exploration seismology. Ray tracing is a powerful and popular method for this purpose. Wavefront construction (WFC) method handles wavefronts instead of individual rays, thereby controlling proper ray density on the wavefront. By adaptively controlling rays over a wavefront, it efficiently models wave propagation. Algorithms for a quasi-P wave wavefront construction method and a new coordinate system used to generate wavefront construction mesh are proposed and tested for numerical properties and modeling capabilities. Traveltimes, amplitudes, and other parameters, which can be used for seismic imaging such as migrations and synthetic seismograms, are computed from the wavefront construction method. Modeling with wavefront construction code is applied to anisotropic media as well as isotropic media. Synthetic seismograms are computed using the wavefront construction method as a new way of generating synthetics. To incorporate layered velocity models, the model based interpolation (MBI) ray tracing method, which is designed to take advantage of the wavefront construction method as well as conventional ray tracing methods, is proposed and experimental codes are developed for it. Many wavefront construction codes are limited to smoothed velocity models for handling complicated problems in layered velocity models and the conventional ray tracing methods suffer from the inability to control ray density during wave propagation. By interpolating the wavefront near model boundaries, it is possible to handle the layered velocity model as well as overcome ray density control problems in conventional methods. The test results revealed this new method can be an effective modeling tool for accurate and effective computing.en
dc.format.extent18138293 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M University
dc.subjectRay Tracingen
dc.subjectWavefront Constructionen
dc.subjectSeismic Modelingen
dc.subjectSeismologyen
dc.subjectForward Modelingen
dc.subjectWave Propagationen
dc.titleEfficient ray tracing algorithms based on wavefront construction and model based interpolation methoden
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentGeology and Geophysicsen
thesis.degree.disciplineGeophysicsen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameDoctor of Philosophyen
thesis.degree.levelDoctoralen
dc.contributor.committeeMemberAllen, Don
dc.contributor.committeeMemberEverett, Mark E.
dc.contributor.committeeMemberRabinowitz, Philip D.
dc.contributor.committeeMemberSparks, David
dc.type.genreElectronic Dissertationen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


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