3D-ISAR using a Single Along Track Baseline

Inverse synthetic aperture radar (ISAR) has been developed to image non-cooperative targets, so they can be classified by an operator or a more advanced classification system. Three dimensional (3D) ISAR is an extension that produces a different target representation designed to improve the classification results. The technique works by estimating the target scatterers' position using measurements from multiple ISAR images. This has previously been achieved using a single receive channel that exploits the temporal motion of the target or with a multi channel dual-baseline interferometric system that uses the phase differences in both the along and across track directions. In this paper, we propose a combination of these two techniques using a single along track baseline suitable for airborne maritime radar systems.