Xj. Xu et Rm. Narayanan, Three-dimensional interferometric ISAR imaging for target scattering diagnosis and modeling, IEEE IM PR, 10(7), 2001, pp. 1094-1102
Two-dimensional (2-D) inverse synthetic aperture radar (ISAR) imaging has b
een widely used in target scattering diagnosis, modeling and target identif
ication. A major shortcoming is that a 2-D ISAR image cannot provide inform
ation on the relative altitude of each scattering center on the target. In
this paper, we present an interferometric inverse synthetic aperture radar
(IF-ISAR) image processing technique for three-dimensional (3-D) target alt
itude image formation. The 2-D ISAR images are obtained from the signature
data acquired as a function of frequency and azimuthal angle. A 3-D IF-ISAR
altitude image can then be derived from two 2-D images reconstructed from
the measurements by antennas at different altitudes. 3-D altitude image for
mation examples from both indoor and outdoor test range data are demonstrat
ed on complex radar targets.