卫星的第一道关是需要一条低空运行轨道。
2016年发射的卫星届时将采集星球表面登陆相关数据，观测站会将图片和其他信息传回地球以供分析。
The 2016 satellite would act as the surface vehicle's data-relay station to get its pictures and other information back to Earth.
空间段由低轨卫星构成，为地面用户间、地面用户与信关站之间提供通信链路；
Space segment includes LEO satellites, which provide ground users and gateways with communication links;
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