3D multivalued travel time and amplitude maps |
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| Authors: | P. S. Lucio G. Lambaré A. Hanyga |
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| Affiliation: | (1) Centre de Recherche en Géophysique, École des Mines de Paris, 35 rue Saint Honoré, 77 305 Fontainebleau, France;(2) Institute for Solid Earth Physics, University of Bergen, Allegaten 41, 5007 Bergen, Norway |
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| Abstract: | An algorithm for computing multivalued maps for travel time, amplitude and any other ray related variable in 3D smooth velocity models is presented. It is based on the construction of successive isochrons by tracing a uniformly dense discrete set of rays by fixed travel-time steps. Ray tracing is based on Hamiltonian formulation and includes computation of paraxial matrices. A ray density criterion ensures uniform ray density along isochrons over the entire ray field including caustics. Applications to complex models are shown. |
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| Keywords: | 3D Ray tracing travel time amplitude Hamiltonian Lagrangian manifold 3D Overthrust model |
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