Migration
The most often used 2D and 3D imaging tool is Kirchhoff pre-stack time and depth migration. The GeoCenter process employs an amplitude preserving algorithm. Either a straight ray or 4th order curved ray and a converted cave travel time computation is used. Migration from a surface is also available. The popularity of the Kirchhoff algorithm is primarily due to its flexibility. Target oriented output and arbitrary input source and receiver locations are examples. The process is made parallel and run in a Linux cluster environment. For depth migration, travel timetables are computed using an eikonal solution.
	3-D Prestack Kirchhoff Time Migration
Another 3D pre-stack time migration we offer is an implementation of a radial DMO technique described by Gardner. The output data are migrated but not NMO corrected. Several other post/pre-stack depth migration processes are available. They include both an explicit and implicit finite difference algorithms. The explicit uses a Hale-McClellend-Remez solution while the implicit is an f-x-y approach. There is an implementation of the Gazdag phase shift migration to handle dips past 90 degrees.