Double-scatter tracks in 1D and 2D images

摘要

Summary form only given. Double-scatter phenomena were illustrated by examining the types of tracks which result from forming ISAR (inverse-synthetic aperture radar) images of targets with strong multiple scattering. One-dimensional images were illustrated, for which the tracks consist of varying range versus angle. Two-dimensional images were then illustrated, for which the tracks consist of varying range and cross-range versus angle. 2-D image tracks were simplified by introducing a relatively unusual target-based coordinate system. Normally, 2-D images are displayed with the downrange axis fixed vertically on the page. As the aspect angle changes, the target effectively rotates by the negative of the aspect angle. This gives the viewer a fixed-radar perspective-the radar is always at the bottom of the page, pointing up toward the rotating targets. An alternative imaging method gives the viewer a fixed-target perspective-the target remains stationary while the radar revolves around it.