| With Geosynchronous SAR as the transmitter and mobile platform as the receiver,GEO-mobile platform Bi SAR is a one kind of bistatic SAR system.It not only has the advantages of short revisit period,wide coverage beam,long imaging time,high security and concealment of GEO SAR,but also has the advantages of high mobility and flexible configuration of the mobile platform.It has broad prospects in civil,military and other fields.The configuration of the bistatic SAR is closely related to the imaging performance of the system.Reasonable design of configuration and mobile platform trajectory are the point of realize high-resolution imaging of GEO-mobile platform bistatic SAR.This thesis research on the trajectory planning of GEO-mobile platform Bi SAR,the main contents are as follows:1.The GEO Orbital Properties are analyzed.The quantitative relation between imaging performance and the configuration parameters of mobile platform are derived.The influence of the bistatic SAR configuration on the imaging performance is revealed,which lays a theoretical foundation for trajectory planning.2.The GEO-mobile platform Bi SAR trajectory planning method is proposed.Establishing an optimal model for configuration planning of mobile platforms.By solving motion trajectory of mobile platform with genetic algorithm,the trajectory of the mobile platform under the imaging needs and real conditions can be generate.3.The GEO-mobile platform Bi SAR trajectory online planning method is proposed.By using the ELM.It solves the problem of quickly generating a new maneuvering platform flight trajectory that meets the mission requirements when the maneuvering platform has trajectory deviation and configuration degradation.The above design methods have been verified by simulation,and the verification results show that the above methods can effectively complete the trajectory planning of the GEO-mobile platform Bi SAR and the online trajectory design when the mobile platform has a certain deviation. |
