Study On Performance Analysis And Simulation Technology Of Distributed Satellites SAR-GMTI System

Distributed spaceborne SAR system is a novel spaceborne radar system which combine satellite formation flying technology and spaceborne SAR technology perfectly. By formation flying and cooperation of several satellites, the system can realize Ground Moving Target Indication (GMTI) designation function. GMTI of distributed spaceborne SAR system gives the opportunity for large scale surveillance, spying, target tracking and position. Because of its special value for military and civil application, the distributed spaceborne SAR system is currently one of the research focuses all around the world.One of the key problems of the system design is how to analyze and evaluate the distributed satellite SAR-GMTI system performance objectively and effectively. In the period of distributed satellite SAR-GMTI system design, it needs to combine theoretical analysis and system simulation for analyzing and evaluating the system performance. This paper encloses this key problem and launches researches on performance analysis and simulation experiment technology of distributed satellite SAR-GMTI system.Firstly, based on distributed satellite SAR-GMTI principle, for two kinds of processing technology: SAR-ATI and SAR-DPCA technology, performance indicators and performance analysis method of the system are given, and then system performance of main influence factors are carded.Secondly, based on formation satellite orbit model, three-dimensional scene ground clutter signal model and moving target signal model, satellite SAR-GMTI system simulation modeling and enforcing method are studied. A distributed satellite SAR-GMTI system performance evaluation method is presented, and combined with the simulation experiment, the effectiveness of the evaluation method is verified. In addition, a set of distributed satellite SAR-GMTI system simulation software is introduced, which is developed by our staff-room-team, and a whole process of system simulation is given.Finally, by application of distributed satellite SAR-GMTI system simulation software and performance evaluation method, different levels of distributed satellite SAR-GMTI system performance simulation experiments is carried out with composite errors in different conditions in it. The simulation verifies the coherence of the theoretical performance analysis results and the performance evaluation results.