sfmig2 implements 2-D prestack Kirchhoff time migration.
The program is using triangle antialiasing filters.
J. F. Claerbout, 1992, Anti Aliasing: SEP-73, Stanford Exploration Project, 371-390.
D. E. Lumley, J. F. Claerbout, and D. Bevc, 1994, Anti-aliased Kirchhoff 3-D migration: SEG Annual Meeting, Expanded Abstracts, 1282-1285.
The following example from sep/aal/gulf shows migration applied to a near-offset section from the Gulf of Mexico.
The amount of antialiasing is controlled by antialias= parameter.
A half-derivative waveform-correction filter (rho filter) is applied and is controlled by rho= parameter.
The program has an adjoint flag adj= and can be used as a linear operator. The default value adj=y corresponds to migration, adj=n corresponds to modeling (demigration).
An additional required input is vel= (time-migration velocity). An optional output is gather= (common-offset image gathers).