Summary for GEO-2007-117.R2

Shragge extends Riemannian wavefield extrapolation, a method of one-way wavefield extrapolation, to 3D non-orthogonal coordinate systems that circumvent existing implementation issues.  Analytically defined coordinate systems are used to validate the non-orthogonal propagation theory, while meshed grids conforming to Eikonal-equation solutions illustrate the dynamic extension of this approach.