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- W2141163114 abstract "Geophysical inversion seeks to determine the structure of the interior of the earth from data obtained at the surface. The entire seismic experiment can be described as a propagating wavefield, and the observed seismic data represent the values of this wavefield measured at the surface of the earth. The seismic data processing technique known as migration represents a method of first reconstructing this wavefield, and then extracting from this wavefield an image of the subsurface structure. More specifically, migration may be described as the process of the depropagation of the surface seismic data backward in time, and the required image is obtained when time is reduced to zero. Because the depropagation process itself requires knowledge of the unknown structure, various types of migration processes have evolved to overcome this difficulty. In the popular methods of constant-velocity migration and stratified-velocity migration, statistical arguments are used as justification, whereas in the method known as depth migration, an iterative improvement approach can be used." @default.
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- W2141163114 date "1984-07-01" @default.
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- W2141163114 title "Image Reconstruction in Exploration Geophysics" @default.
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- W2141163114 doi "https://doi.org/10.1109/t-su.1984.31506" @default.
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