Due to long communication delay between target asteroid and base stations and complex mutable dynamic environment of small body, the traditional GNC mode based on deep space network (DSN) is no more suitable for landing spacecraft on small body.

• 由于目标小天体和地面站之间存在较长的通汛延迟,加之小天体的动力学环境复杂多变,传统的基于深空网的导航、制导与控制(GNC)模式已不再适合探测器着陆小天体。