Journal Article10.1109/PROC.1983.12698
A tomographic formulation of spotlight-mode synthetic aperture radar
David C. Munson,J. D. O'Brien,W.K. Jenkins +2 more
- 01 Aug 1983
- Vol. 71, Iss: 8, pp 917-925
787
TL;DR: In this article, a projection-slice theorem from computer-aided tomograpy (CAT) is used to analyze the signal recorded at each SAR transmission point, which is modeled as a portion of the Fourier transform of a central projection of the imaged ground area.
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Abstract: Spotlight-mode synthetic aperture radar (spotlight-mode SAR) synthesizes high-resolution terrain maps using data gathered from multiple observation angles. This paper shows that spotlight-mode SAR can be interpreted as a tomographic reeonstrution problem and analyzed using the projection-slice theorem from computer-aided tomograpy (CAT). The signal recorded at each SAR transmission point is modeled as a portion of the Fourier transform of a central projection of the imaged ground area. Reconstruction of a SAR image may then be accomplished using algorithms from CAT. This model permits a simple understanding of SAR imaging, not based on Doppler shifts. Resolution, sampling rates, waveform curvature, the Doppler effect, and other issues are also discussed within the context of this interpretation of SAR.
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References
•Proceedings Article
Microwave Imaging
Chiang Ching Shan
- 01 Sep 1979
TL;DR: In this paper, a method of microwave imaging and principle designing models of the microwave imaging tubes are suggested, the results discussed in this paper are also suitable to either passive or active method of imaging.
Dual algorithms for fast calculation of the Fourier-Bessel transform
TL;DR: In this article, a dual Fourier selection-summation (FSS) and Bessel function large argument asymptotic expansion (LAA) algorithm is proposed for fast calculation of the Fourier-Bessel transform.