The Launch and Test Range System includes ground-based surveillance, navigation, flight operations and analysis, command and control, communications and weather assets for space missions.
发射和测试系统包括空间飞行的地面系统任务的监视，导航，飞行操作和分析，指挥和控制，通信和气象资产。
2
Radar tracking of the shuttle, like the final accurate ground-basednavigation, had not yet begun.
对航天飞机的雷达追踪，如最后精确的陆基导航，还没有开始。
3
An optical signature simulator was proposed and developed for simulations and ground experiments of optical-based autonomous navigation sensors for deep space exploration.