月地高速激光通信系统链路特性分析

Analysis of Link Characteristics of High-Speed Laser Communication System in Lunar-Ground Link

根据地球、月球、探月卫星的三体运动,针对月地激光链路的建立与保持,分析了地球与月球对链路的遮挡问题,对链路模式进行分析。仿真结果表明:使用3颗月球极轨(Moon Polar Orbit,MPO)卫星来进行通信时,链路中断的次数将大大减少,但是在某些时间段上,仍然受到月球的遮挡而迫使通信链路频繁中断。使用4颗MPO卫星来进行通信时,链路将不再受到月球的阻挡,而仅受到地球的遮挡。同理,增加地球同步轨道卫星的数目可避免地球的遮挡。仿真结果表明,采用2颗地球同步轨道(Geostationary Earth Orbit,GEO)卫星建立链路,链路将不会受到地球的遮挡,建立深空科学研究的信息中继中心,采用激光通信技术,实现月地高速激光信息传输,为我国深空探测技术的发展提供支撑。

According to the three-body motion of the Earth,the Moon and the lunar satellite,the occlusion problem of the Moon-Earth link and the link mode are analyzed.The simulation results show that when three MPO satellites are used for communication,the number of link interruptions will be greatly reduced,but in some certain periods,the communication link is still interrupted by the occlusion of the moon frequently.When using four MPO satellites for communication,the link will no longer be blocked by the Moon,but only blocked by the Earth.By the same token,increasing the number of geosynchronous orbiting satellites can avoid occlusion of the Earth.The simulation results show that the link is established by two GEO satellites,and the link will not be blocked by the Earth.An information relay center for deep space science research is established.The laser communication technology is used to achieve high-speed laser information transmission between the Moon and the Earth,providing support for the development of deep space exploration technology in China.