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.
History files summarize parameters and execute programs
for all 240 shot-receiver configurations in profile lines.
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We compute and stack 81 migrated sections calculated in the 2-D plane
located in the middle of the shot-receiver configuration.
The first profile line starts at horizontal coordinate
x2=4 km and
the last profile line ends at horizontal coordinate
x2=6 km.