Abstract

In Chapter 9 the results presented in Chapter 8 are generalized to the case of horizontally layered medium. We start with formulating boundary value problem, for 3-layer structure and work out solutions to obtain accurate expressions involving integration of Bessel functions. As a result of this approach, a number of asymptotic expressions are derived, which allow one to understand the field behavior in approximations like wave/near zone. Then generalization to N-layered model is made. Time-domain responses are analyzed by making use of series expansion to evaluate asymptotic formulas. A number of specific models are considered including thin sheet S-plane and 1D layered sequence with non-conducting basement.

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