High-order kernels for Riemannian wavefield extrapolation

Paul Sava

paul@sep.stanford.edu

ABSTRACT

High-order kernels for Riemannian wavefield extrapolation (RWE) are developed and demonstrated by impulse responses for models which are difficult or impossible to handle with Cartesian downward continuation. Those kernels improve the accuracy of extrapolation, particularly for situations when the Riemannian coordinate systems does not match closely the general direction of wave propagation (e.g. triplicating wavefields and migration from topography).