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Proceedings Paper

Design criteria and comparison between conventional and subaperture SAR processing in airborne systems
Author(s): Pau Prats; Marc Bara; Antoni Broquetas
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Paper Abstract

This paper compares two different approaches for designing airborne SAR systems. The first one is the most common where conventional processing is employed, and therefore wide antenna beams are to be used in order to avoid ambiguities in the final image due to attitude variations. A second approach is proposed to lower the requirements such system imposes based on subaperture processing. The idea is to follow the azimuth variations of the Doppler centroid, without increasing the hardware requirements of the system. As it is shown in this paper, this processing procedure must be complemented with precise radiometric corrections, because the platform may experience small attitude variations, which could increase/decrease the target observation time, inducing a significant azimuth modulation in the final image. This leads to the definition of a new criterion concerning maximum attitude deviations for an airborne platform.

Paper Details

Date Published: 28 January 2002
PDF: 11 pages
Proc. SPIE 4543, SAR Image Analysis, Modeling, and Techniques IV, (28 January 2002); doi: 10.1117/12.453973
Show Author Affiliations
Pau Prats, Univ. Politecnica de Catalunya (Spain)
Marc Bara, Univ. Politecnica de Catalunya (Spain)
Antoni Broquetas, Univ. Politecnica de Catalunya (Spain)

Published in SPIE Proceedings Vol. 4543:
SAR Image Analysis, Modeling, and Techniques IV
Francesco Posa, Editor(s)

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