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Society for Industrial and Applied Mathematics, Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 1(5), p. 62-83

DOI: 10.1137/050633524

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Coherent Interferometry in Finely Layered Random Media

Journal article published in 2006 by Liliana Borcea, George Papanicolaou, Chrysoula Tsogka ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We study broadband, coherent interferometric array imaging (CINT) in finely layered me-dia, in a regime with strong fluctuations. By coherent interferometric imaging we mean the backpropagation of time-windowed cross correlations of the array data. For waves propagating over long distances there is statistical stabilization of the traces observed at the array. They have the form of a coherent signal that can be described by the O'Doherty-Anstey (ODA) the-ory, followed by long and noisy codas. We show that coherent interferometry exploits the time coherence in the data, leading to stable images. Moreover, we prove that in this regime only the ODA behavior plays a role in the imaging and we quantify explicitly the resolution of CINT in terms of this time coherence and the array aperture. We illustrate the theory with numerical simulations.