Speed up of near-field physical optics scattering calculations by use of the sampling theorem

Physical optics scattering calculations performed on the NASA Deep Space Network (DSN) 34-meter beam-waveguide antennas at Ka-band requires approximately 12 hours CPU time on a Cray Y-MP2 computer-excessive in terms of resource utilization. The calculations are done two mirrors at a time. The sampli...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1994-09, Vol.30 (5), p.3156-3159
Main Authors: Cramer, P.W., Imbriale, W.A.
Format: Article
Language:English
Subjects:
Applied classical electromagnetism
Computer networks
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Interpolation
Mirrors
NASA
Optical computing
Optical scattering
Physical optics
Physics
Physics computing
Resource management
Sampling methods
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Summary:Physical optics scattering calculations performed on the NASA Deep Space Network (DSN) 34-meter beam-waveguide antennas at Ka-band requires approximately 12 hours CPU time on a Cray Y-MP2 computer-excessive in terms of resource utilization. The calculations are done two mirrors at a time. The sampling theorem is used to reduce the number of points on the second surface obtained by performing a physical optics integration over the first surface. The number of points required by subsequent physical optics integrations is obtained by interpolation. Time improvements on the order of 2 to 4 were obtained for typical scattering pairs.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.312607