Motion error analysis for ISAR imaging of space targets

Since the trajectories of space targets can be actually tracked, we can apply the Backprojection (BP) method to Inverse Synthetic aperture radar (ISAR) imaging of satellite. Due to the limitation of an accuracy of the tracking data in some scenarios, the motion errors of the target cannot be avoided. We cannot obtain good reconstructed-images. In this paper, we present an analysis of the motion errors of the targets in ISAR imaging. Our analysis provides an explicit quantitative relationship between the motion errors of the target and the position errors in the reconstructed ISAR image. We provide simulation results to demonstrate the performance of analysis. This analysis is helpful for developing autofocus methods for ISAR imaging of space targets.