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Transient effects at a velocity discontinuity in up/down filtering

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2 Author(s)
Marzetta, T.L. ; Nichols Res. Corp., Wakefield, MA, USA ; Burridge, R.

The up/down convolutional velocity filter is commonly used in vertical seismic profiling to separate an upgoing from a downgoing wave field. In the neighborhood of a velocity discontinuity one expects to see transient effects. For a simple medium containing a single velocity discontinuity it is possible to derive an explicit formula for these transients. This analysis predicts that the transients decay at a rate inversely proportional to the distance from the velocity discontinuity. Despite the slow decay rate, these transients are found to be quite insignificant

Published in:

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Date of Conference:

11-14 Apr 1988