3-D Kirchhoff prestack depth migration
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We use the MODEL, CRT, FORMS and DATA
packages for the Kirchhoff prestack depth migration
(Cerveny, Klimes & Psencik, 1988; Bulant, 1996).
The migration consists of two-parametric ray tracing from
individual surface points, calculating grid values of travel time
and amplitude, common-shot migration and stacking of migrated images.
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We compute and stack 81x240 images from all
parallel source-receiver lines in the central 2-D plane.
This image represents one vertical section of full 3-D migrated
volume.
The constructive interference focuses the migrated interface and
the destructive interference
reduces undesirable migration artifacts.