


 Angledomain commonimage gathers in generalized coordinates  

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Angledomain commonimage gathers in generalized coordinates
Jeff Shragge
Abstract:
The theory of angledomain commonimage gathers (ADCIGs) is extended to migrations performed in generalized 2D coordinate systems. I develop an expression linking the definition of reflection opening angle to various generalized geometric factors. I demonstrate that generalized coordinate ADCIGs can be calculated directly using Fourierbased offsettoangle approaches for coordinate systems satisfying the CauchyRiemann differentiability criteria. The canonical examples of tilted Cartesian, polar, and elliptic coordinates are used to illustrate the ADCIG theory. I compare analytically and numerically generated image volumes for a set of elliptically shaped reflectors. Experiments with a synthetic data set illustrate that ellipticcoordinate ADCIGs betterresolve the reflection opening angles of steeply dipping structure, relative to conventional Cartesian image volumes, due to improved largeangle propagation and enhanced sensitivity to steep structural dips afforded by coordinate system transformations.



 Angledomain commonimage gathers in generalized coordinates  

Next: Introduction
Up: Reproducible Documents
20090413