Azimuth Velocity Estimation of Moving Target Based on Azimuth Dual Beam SAR System

This paper introduces a method for estimating the azimuth velocity of moving target based on dual-beam SAR system, and the simulation results verify that this method has high estimation accuracy and stability on the SAR platform with high-speed aircraft. At first, this paper analyses the azimuth position offset of the moving target under the condition of squint. Subsequently, it analyses that the azimuth position difference of the moving target after offset is affected by the azimuth velocity and the distance velocity of the moving target in the two images of the dual-beam. In the high-speed aircraft platform, the influence of the distance velocity can be ignored, and then the azimuth velocity can be estimated according to the position difference of the moving target in the dual-beam image.