Parallel finite-difference migration

Stewart A. Levin

doi:10.1117/12.164839

1 December 1993 Parallel finite-difference migration

Stewart A. Levin

Proceedings Volume 2033, Mathematical Methods in Geophysical Imaging; (1993) https://doi.org/10.1117/12.164839
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Finite-difference migration in the natural x-t coordinates, e.g. the 15-degree implicit wave- equation method, has been in common use for over a decade of geophysical data processing. As such, it predated the invention of large vector computers, such as the Cray-1S introduced in 1977, and so was organized and optimized to achieve the sensible objectives of reducing the number of computations and I/O operations as much as possible. Outboard array processors, employed to accelerate computations, changed the relative weights of computation and I/O but still fit comfortably into existing program designs. Since the mid 80's the author has revisited the implementation of 15-degree implicit finite-difference migration on vector and parallel computers now in common use and found that impressive performance gains can be achieved by completely reorganizing the computations. This report summarizes the highlights of these efforts and gives benchmark results for a variety of vector and parallel platforms.

Citation Download Citation

Stewart A. Levin "Parallel finite-difference migration", Proc. SPIE 2033, Mathematical Methods in Geophysical Imaging, (1 December 1993); https://doi.org/10.1117/12.164839

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