Bistatic ISAR images from a time-domain code

Author

Simon, Michael P. ; Schuh, M.J. ; Woo, Alex C.

Author_Institution

MPS Eng., Los Altos, CA, USA

Volume

37

Issue

5

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

25

Lastpage

32

Abstract

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

Keywords

Fourier transforms; image resolution; physical theory of diffraction; radar cross-sections; radar imaging; synthetic aperture radar; time-domain analysis; Fourier domain; ISAR images; PTD code; XPATCH; bistatic ISAR images; bistatic ISAR imaging; bistatic scattering data; cone-sphere; finite-volume time-domain code; image extent; incident angles; inverse synthetic aperture radar; iterative method; low-frequency algorithms; physical theory of diffraction; pixel resolution; radar targets; range; resolution; ringing effects; scattering centers analysis; square-aperture cavity; tapering function; target identification; time-domain code; trapezoidal plate; Image analysis; Image resolution; Iterative algorithms; Iterative methods; Physical theory of diffraction; Pixel; Radar imaging; Radar scattering; Time domain analysis; Visualization;

fLanguage

English

Journal_Title

Antennas and Propagation Magazine, IEEE

Publisher

ieee

ISSN

1045-9243

Type

jour

DOI

10.1109/74.475861

Filename

475861