3D Moving Target Doppler Performance for Distributed LEO SAR

This paper focuses on the 3D moving target Doppler performance of distributed Low Earth Orbit (LEO) SAR in spaceborne air moving target indication (AMTI). Based on traditional two-dimensional velocity estimation, we expand to realize the analysis of the impact of spaceborne distributed SAR with the three-dimensional velocity and acceleration for moving target detection. Firstly, a spaceborne distributed SAR moving target 3D imaging model of the three-dimensional velocity and acceleration is established respectively. Then, the analytical relationship between the multi-baseline Doppler parameters and the three-dimensional velocity and acceleration are analyzed. Finally, simulations are conducted to illustrate the validity of the velocity and acceleration on the Doppler centroid and frequency rate.