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Proceedings Paper

Parallel finite-difference migration
Author(s): Stewart A. Levin
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Paper 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.

Paper Details

Date Published: 1 December 1993
PDF: 5 pages
Proc. SPIE 2033, Mathematical Methods in Geophysical Imaging, (1 December 1993); doi: 10.1117/12.164839
Show Author Affiliations
Stewart A. Levin, Mobil Exploration and Producing Technical Ctr. (United States)

Published in SPIE Proceedings Vol. 2033:
Mathematical Methods in Geophysical Imaging
Sergio E. Zarantonello, Editor(s)

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