satellite re-entry guidance

例句：

1. 1.The spacecraft's guidance system was designed to ensure safe re-entry into the atmosphere.
   该航天器的导航系统设计用来确保安全再入大气层。
2. 2.The new guidance algorithm is expected to improve the accuracy of the mission's navigation.
   新的导航算法预计将提高任务导航的准确性。
3. 3.The guidance system used by the spacecraft was based on advanced radar technology.
   该航天器使用的导航系统基于先进的雷达技术。