Analysis of 3D-SAR based on Angle Compression Principle

This paper presented the 3D-SAR based on angle compression principle which could, in contrast to conventional single-channel 2D-SAR, create the real 3D resolution cells to avoid geometric distortions. Except for conventional side-looking mode, 3D-SAR system herein can be operated in downward-looking mode which can avoid shadowing effects. The angle compression principle and the angular ambiguity problem are analyzed in this paper. The analytic expression of angle compression and the condition which should be satisfied to avoid angular ambiguity are also derived in this part. The demonstration of the feasibility of the 3D-SAR based on angle compression principle and the angular ambiguity problem are given by simulation in the last part of this paper.