A Design of Moving Target Imaging Technology for Distributed SAR with Geosynchronous Illuminator

In this paper, an imaging method of distributed synthetic aperture radar (SAR) system with geostationary orbit (GEO) as the transmitting source and near-space orbit (NEO) as the receiving end is proposed to achieve high precision imaging of moving targets. The system uses a single geostationary orbit transmitting platform to transmit signals, and multiple distributed near-space receiving platforms to receive echoes. The radar echoes of different receiving platforms are reconstructed by phase compensation processing, and the reconstructed signals are focused with high precision through RCM correction and compressed sensing (CS). A complete design scheme is proposed from the aspects of configuration design, echo synthesis and imaging algorithm design. Finally, the effectiveness of the proposed method is verified by simulation.