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- W3144057224 abstract "Wavefield extrapolation downward from the surface, as applied in migration and associated inversion methods, is a common procedure to image subsurface reflectors. These methods require adequate (i.e., extensive and unaliased) sampling of the surface wavefield. Seismic tomography on the other hand, relates parameters of the upward propagated wavefield to the diffracting image, and sampling requirements are less severe; it is usually the only option to image deep structures from sparse data. The ordinary form of ray tomography, however, imposes a severe smoothness constraint on the boundary; in particular the tops and valleys of a relatively rough structure are not well-resolved. We have implemented a generalized form of tomography, which uses both the ray term and the diffraction term linearized in the boundary perturbation. We introduce a generalized reflection coeffi-" @default.
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- W3144057224 date "1994-04-01" @default.
- W3144057224 modified "2023-09-27" @default.
- W3144057224 title "Modified form of diffraction tomography to image boundary structures" @default.
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- W3144057224 doi "https://doi.org/10.1016/0148-9062(94)93036-8" @default.
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