月基SAR对地观测系统参数分析

System parameters analysis of the Moon-based SAR Earth observation

随着人类探月活动的发展,以月球作为观测平台对地球进行合成孔径雷达(Moon-based synthetic aperture radar,Moon-based SAR)观测研究引起了诸多学者的关注。Moon-based SAR具有长期、大尺度、连续动态的观测优势,可望为固体地球宏观运动现象的观测提供新途径。针对科学应用需求,并考虑地月相对运动关系和影像性能的约束条件,进行了Moon-based SAR系统关键参数分析与仿真。数值计算结果表明,Moon-based SAR具有超宽幅对地观测的应用潜力,在满足成像性能的要求下,采用多波束工作模式测绘带宽可达上千千米。

With the development of the Moon exploration,the concept of deploying sensors of synthetic aperture radar based on the Moon(Moon-based SAR)to fully and constantly observe the Earth is gaining increased attention.The Moon-based SAR has the advantages of long-term,large-scale and continuous observation,and it may provide a new way for macro-scale solid Earth monitoring.Here,the system parameters theoretically are analyzed and simulated considering at the requirements of large-scale Earth observation.In addition,the actual relative motion parameters of the Earth-Moon system and the performance of the Moon-based SAR imaging are taken into account.The results show that the Moon-based SAR has the potential of ultra-wide observation applications.It can form an imaging swath of thousands of kilometers by using multi-beam SAR with good imaging performance.