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Proceedings Paper

Prospects for mm-wave aperture synthesis from spaceborne and aerial platforms
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Paper Abstract

Passive imaging using mm-waves offers very significant advantages in scientific and military surveillance. However, the relatively long wavelengths mean that for the resolutions that are sought, the input aperture of the imager needs to be quite large, typically in excess of one meter. Deployment of conventional dish antennas of these dimensions on aircraft and in Low Earth Orbit is highly problematic. The use of snapshot synthetic aperture interferometric radiometry (SAIR) offers an attractive route to integrating a two-dimensional antenna array into the structure of an aircraft so that the transverse dimensions of the antenna can be almost as large as the aircraft. We report here a study into the feasibility of deployment of a SAIR on unmanned airborne vehicles and the achievable performance parameters. The critical considerations are the achievement of acceptable sensitivity and angular resolution from a SAIR that does not require excessive complexity. It is shown that traditional approaches based on fully sampling the spatial frequencies in the scene are unable to simultaneously meet all of these criteria, but a that a SAIR based on thinned sampling of the spatial frequencies shows promise.

Paper Details

Date Published: 31 October 2000
PDF: 12 pages
Proc. SPIE 4091, Imaging Technology and Telescopes, (31 October 2000); doi: 10.1117/12.405794
Show Author Affiliations
Andrew Robert Harvey, Cranfield Univ. (United Kingdom)
Roger Appleby, Defence Evaluation and Research Agency Malvern (United Kingdom)

Published in SPIE Proceedings Vol. 4091:
Imaging Technology and Telescopes
James W. Bilbro; James B. Breckinridge; Mark J. Eckart; James B. Breckinridge; Richard A. Carreras; Richard A. Carreras; James W. Bilbro; Stanley R. Czyzak; Robert D. Fiete; Mark J. Eckart; Robert D. Fiete; Paul S. Idell, Editor(s)

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