Accession Number:

AD0274719

Title:

BROWN CRYSTALLOGRAPHIC FOURIER SYNTHESIS PROGRAM, BXFS

Descriptive Note:

Corporate Author:

BROWN UNIV PROVIDENCE R I METCALF CHEMICAL LABS

Personal Author(s):

Report Date:

1962-04-01

Pagination or Media Count:

1.0

Abstract:

This relatively simple two- and three-dimensional Fourier synthesis program, designated BXFS, was written for a limited configuration of the IBM 7070 computer. The BXFS Brown Crystallographic Fourier Synthesis program is designed to be fast and simple at the cost of some sacrifice of flexibility. This approach was chosen because of the limited storage capacity 5000 words of the Brown IBM 7070 installation. The essential simplifying feature is the limitation of groups of input data, intermediate sums, or final results to blocks of exactly 16 x 16 256 items. This is achieved by evaluating the synthesis at intervals of 160 in each coordinate and by limiting the indices which may be accommodated to a maximum absolute value of 31 for each. However, a coordinate interval of 130 may be chosen by doubling the corresponding indices. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE