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一、前言航天飞机是空间站,宇航器、卫星(包括各种科学试验、对地测量和通讯等卫星)及宇宙科学试验器等有效的运载工具。航天飞机一次飞行时间比弹道式导弹及卫星等运载火箭的飞行时间要长得多,并且在飞行过程中要求实时知道运载器的飞行参数,因此,航天飞机需要工作时间长的导航、制导系统。航天飞机的飞行一般具有运载火箭飞行的特点,因此要求有轨道飞行段校准控制。
I. INTRODUCTION The space shuttle is an effective means of delivery such as space station, spacecraft, satellite (including various kinds of scientific experiments, satellites for geodesy and communications) and cosmic science tester. A space shuttle takes longer to fly than a launch vehicle such as ballistic missiles and satellites and requires real-time knowledge of the flight parameters of the vehicle during the flight. Therefore, the space shuttle needs long-time navigation and guidance systems. Space shuttle flights generally have the characteristics of launch vehicle flight, thus requiring orbital flight section calibration control.