Forward modeling and data inversion for beam propagation in a stratified medium. I: Theory

Research output: Contribution to journalArticle

Abstract

A previously developed matrix Green's function formulation [I. T. Lu and L. B. Felsen, Geophys. J. R. Astron. Soc. 84, 31-42 (1986)] for line-source excited propagation in piecewise-homogeneous stratified media is extended to allow arbitrarily inhomogeneous layers and beam source excitation. This formulation reveals dominant wave processes and allows simultaneous excitation and detection at arbitrarily specified locations. It provides a unified and systematic approach for deriving all alternative representations including mode, ray (beam), spectral integral, ray (beam) mode, collective ray (beam), etc. Both rigorous and practical aspects of the analytic continuation procedures in the complex source point technique are discussed in detail. An efficient beam source localization algorithm, which estimates the beam parameters and the beam location sequentially, is also presented. Numerical results are presented in a companion paper [I. T. Lu and H. Y. Chen, J. Acoust. Soc. Am. 91, 1239-1249 (1992)].

Original languageEnglish (US)
Pages (from-to)1228-1238
Number of pages11
JournalJournal of the Acoustical Society of America
Volume91
Issue number3
DOIs
StatePublished - 1992

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inversions
propagation
rays
formulations
Modeling
Inversion
point sources
excitation
Green's functions
Ray
estimates
matrices
Companionship
Spectrality
Continuation
Layer
Waves
Localization

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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Forward modeling and data inversion for beam propagation in a stratified medium. I : Theory. / Lu, I-Tai.

In: Journal of the Acoustical Society of America, Vol. 91, No. 3, 1992, p. 1228-1238.

Research output: Contribution to journalArticle

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