A new look at spotlight mode synthetic aperture radar as tomography: imaging 3-D targets
Autor: | Paul A. Thompson, Charles V. Jakowatz |
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Rok vydání: | 1995 |
Předmět: |
Synthetic aperture radar
Layover Computer science business.industry Side looking airborne radar Filter (signal processing) Iterative reconstruction Computer Graphics and Computer-Aided Design Reflectivity law.invention Inverse synthetic aperture radar law Radar imaging Computer vision Tomography Artificial intelligence Radar business Software Image restoration |
Zdroj: | IEEE Transactions on Image Processing. 4:699-703 |
ISSN: | 1941-0042 1057-7149 |
Popis: | A new 3D tomographic formulation of spotlight mode synthetic aperture radar (SAR) is developed. This extends the pioneering work of Munson et al. (1983), who first formally described SAR in terms of tomography but who made the simplifying assumption that the target scene was 2D. The present authors treat the more general and practical case in which the radar target reflectivities comprise a 3D function. The main goal is to demonstrate that the demodulated radar return data from a spotlight mode collection represent a certain set of samples of the 3D Fourier transform of the target reflectivity function and to do so using a tomographic paradigm instead of traditional range-Doppler analysis. They also show that the tomographic approach is useful in interpreting the reconstructed 2D SAR image corresponding to a 3D scene. Specifically, the well-known SAR phenomenon of layover is easily explained in terms of tomographic projections and is shown to be analogous to the projection effect in conventional optical imaging. |
Databáze: | OpenAIRE |
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