Key points are not available for this paper at this time.
The use of an adaptive-grid formalism for seismic, non-linear traveltime tomography is proposed. The method is based on a parametric representation of the velocity model and involves the simultaneous inversion for both velocity and position of the grid points of the model discretization mesh. Therefore, the method seeks the optimal grid configuration to define the model. Cubic B-spline basis functions have been used for model representation as they are particularly versatile in the reproduction of geologically complex structures. The traveltimes are calculated using a new initial-value ray tracer that calculates the ray trajectories directly in the parametric domain.
Alberto Michelini (Mon,) studied this question.