Bistatic ISAR images from a time-domain code

Inverse-synthetic-aperture-radar (ISAR) images of radar targets are useful for target identification, visualization, and the analysis of scattering centers. The major advantage of bistatic over monostatic-ISAR imaging is the reduction, in the number of computed incident angles, from hundreds to one....

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Bibliographic Details
Published in:IEEE antennas & propagation magazine 1995-10, Vol.37 (5), p.25-32
Main Authors: Simon, M.P., Schuh, M.J., Woo, A.C.
Format: Magazinearticle
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Image analysis
Image resolution
Iterative algorithms
Iterative methods
Physical theory of diffraction
Pixel
Radar imaging
Radar scattering
Radiolocalization and radionavigation
Telecommunications
Telecommunications and information theory
Time domain analysis
Visualization
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Summary:Inverse-synthetic-aperture-radar (ISAR) images of radar targets are useful for target identification, visualization, and the analysis of scattering centers. The major advantage of bistatic over monostatic-ISAR imaging is the reduction, in the number of computed incident angles, from hundreds to one. This advantage has already been demonstrated for a physical theory of diffraction (PTD) code, XPATCH. The bistatic-imaging technique can be extended to scattering data obtained from any time-accurate or iterative method, including low-frequency algorithms. This paper presents images from data obtained with a finite-volume time-domain (FVTD) code. It also provides relations between (1) the range and resolution of the bistatic scattering data in the Fourier domain, and (2) the pixel resolution and image extent in the physical domain for the down-range and cross-range directions. A tapering function is applied in the Fourier domain, to dampen ringing effects. Results are shown for a trapezoidal plate, a cone-sphere, and a square-aperture cavity.
ISSN:1045-9243
1558-4143
DOI:10.1109/74.475861