Analyzing the coda from correlating scattered surface waves

The accuracy of scattered Rayleigh waves estimated using an interferometric method is investigated. Summing the cross correlations of the wave fields measured all around the scatterers yields the Green's function between two excitation points. This accounts for the direct wave and the scattered field (coda). The correlations themselves provide insights into the location of the scatterers, as well as which scatterer is responsible for particular parts of the coda. Furthermore, these measurements confirm a constant-time arrival in the correlations, not part of the Green's function, but which has previously been derived as a result of the generalized optical theorem. © 2012 Acoustical Society of America.


Published in:
The Journal of the Acoustical Society of America, 131, 3, EL275
Year:
2012
Publisher:
Acoustical Society of America
ISSN:
0001-4966
Laboratories:




 Record created 2015-12-10, last modified 2018-01-28


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