Spaceborne synthetic aperture radar quick-look processing with ECS+FIR algorithm

This paper presents a new spaceborne synthetic aperture radar quick-look algorithm: ECS+FIR, which is based on a sub-aperture approach. The ECS+FIR algorithm uses the sub-aperture approach in azimuth direction instead of FIR filtering and down-sampling approaches as in other quick-look algorithms. The computing amount is reduced greatly compared with other quick-look algorithms. The principle and processing course of the algorithm are discussed in details, and the comparison between the new algorithm and other quick-look algorithms has been carried out, and the advantages of the new algorithm are obvious. Several simulation and processing results are given to demonstrate the feasibility of the algorithm.