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generalised interferometry

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6 - Correlations and Interferometry
from Part II - Correlation Wavefields
Brian L. N. Kennett, Australian National University, Canberra, Andreas Fichtner
Book:

Exploiting Seismic Waveforms

Published online:

16 November 2020

Print publication:

03 December 2020, pp 129-156
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Summary

We address the nature of the correlation wavefield and its relation to the group of techniques collectively known as seismic interferometry.We establish a direct representation of the cross-correlation of the seismic signals between two stations and show how, with a suitable distribution of sources, this correlation can provide a virtual source-receiver pair whose phase properties arise from differencing.We then discuss the concept of generalised interferometry with an arbitrary distribution of sources, and illustrate the way in which processing procedures can affect the nature of correlated signals