Green's function retrieval by cross?correlation in case of one?sided illumination

Journal article (2006)

Authors

Department
Geotechnology (CEG) (TU Delft)
Copyright: © 2006 Wapenaar, C.P.A.; American Geophysical Union
DOI: https://doi.org/doi:10.1029/2006GL027747
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Published Date

07-10-2006

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Source:

Geophysical Research Letters, 33, 2006

Faculty

Civil Engineering and Geosciences

Department

Geotechnology

Abstract

The cross-correlation of acoustic wave fields at two receivers yields the exact Green's function between these receivers, provided the receivers are surrounded by sources on a closed surface. In most practical situations the sources are located on an open surface and as a consequence the illumination of the receivers is one-sided. In this Letter we discuss the conditions for accurate Green's function retrieval for the situation of one-sided illumination. It appears that the Green's function retrieval method benefits from the fact that the earth is inhomogeneous, without relying on assumptions about disorder.

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