Real-time Unwrapped Phase Generating Algorithm based on Airborne Dual-antenna InSAR System

In order to satisfy the requirement of terrain mapping in real-time, this paper solves the problem of too large computation in the traditional interferometric processing algorithm, and provides the algorithm to generate real-time unwrapped phase with high quality based on airborne dual-antenna InSAR system. It utilizes non-linear ECS autoregistration imaging algorithm to generate high accuracy auto-registration dual-channel SAR images, which omits the latter time-consuming registration course. During the course of imaging, accurate interferometric motion compensation is introduced. Fast filter is performed on the two SAR images to generate high quality interferometric fringe, and then fast phase unwrapping algorithm based on partitioning the dense residues area is done to get the unwrapped phase. Finally, the processed result of the real InSAR data proves the validation of the algorithm.