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- W2914334346 abstract "The conventional approach to interpretation of the observed electromagnetic data based on standard 3-D forward modeling and inversion meets significant difficulties because of the enormous amount of computations required in the case of the multitransmitter and multireceiver data acquisition systems typical for modern EM geophysical surveys. There exists, however, an alternative approach to the solution of this problem, called EM migration, based on the principles of EM holography, which extends to EM cases the methods of optical and radio holography. Electromagnetic migration is based on a special form of downward continuation of the observed field or one of its components. This downward continuation is obtained as the solution of the boundary value problem in the lower half-space for the adjoint Maxwell's equations, in which the boundary values of the migration field on the earth's surface are determined by the observed electromagnetic field data. Chapter 9 presents an overview of the principles of EM migration in the time and frequency domains. We also discuss the numerical methods of migration including the methods based on integral transformation, digital filters, and finite difference approach. The final section of this chapter presents an iterative migration, which is similar to the conventional iterative inversion, discussed in Chapter 8." @default.
- W2914334346 created "2019-02-21" @default.
- W2914334346 creator A5071334092 @default.
- W2914334346 date "2018-01-01" @default.
- W2914334346 modified "2023-09-24" @default.
- W2914334346 title "Electromagnetic Migration" @default.
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- W2914334346 doi "https://doi.org/10.1016/b978-0-44-463890-8.00012-8" @default.
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