Poststack reverse-time depth migration for anisotropic elastic waves;

And the paper uses the reverse-time depth migration method to realize migration of multiwave and multicomponent informations.

The prestack reverse-time depth migration scheme was studied based on elastic wave equation for two wavefield components recorded in 2D isotropic media.

The numerical results show that this method not only increases difference precision of temporal and spatial derivatives,but also has advantages of higher efficiency and lower dispersion compared with traditional centered finite-difference method;therefore,it can be extended to 3D scalar acoustic high-precision forward numerical simulation and post-stack reverse-time depth migration.

With a nonuniform spatial sampling,reverse time migration imaging algorithm is presented in this paper.

Prestack reverse time migration requires computing the first breaks time of imaging points.

Based on Snell s law, an approach for calculation firstarrival travel times in a transverse isotropic media is developed, of which result can be used as the imaging condition of reverse time migration.

An application of reverse-time migration in the ground-penetrating radar data processing;

Elastic wave reverse-time migration using Hartley transform;

Spectral-element method for prestack reverse-time migration;