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We present a procedure for calculating ray-coordinate system updates
incorporating RWE and phase-ray tracing.
This procedure can successfully generate a ray-coordinate systems that
better conforms with the direction of wavefield propagation.
This fact then leads to an improved wavefield extrapolation operator
fidelity.
However, coordinate system realignment is not always a global
advantage. This is because, as a result, structural dips may be mapped
more steeply in the updated ray-coordinate velocity models.
Importantly, steeper structural dip angles in the velocity model also
inhibit the accuracy of wavefield extrapolation.
Accordingly, we suggest that a trial-and-error (or a more
sophisticated) approach could be used to generate a ray-coordinate
system for RWE that represents an optimal trade-off between improving
operator fidelity and lowering structural dips in resulting velocity
models.

** Next:** Acknowledgments
** Up:** Shragge and Biondi: Ray-coordinate
** Previous:** Example - Sigsbee 2A
Stanford Exploration Project

5/23/2004