空间导航就是估算和控制空间飞行器的轨迹,使其到达预定的飞行目标。就近地卫星来说,空间导航必须给出空间飞行器的位置、速度、姿态和准确时间等数据。对于深空飞行器到达预定的天体,并使其绕轨道运行、着陆或捕获目标,这就要对飞行轨道进行精确的计算和修正。目前,由于有了非常精密的星上敏感器和数据处理系统,并改进 Space navigation is to estimate and control the trajectory of the spacecraft to reach the intended flight target. In the case of near-Earth satellites, space navigation must give data on the position, speed, attitude, and exact time of the spacecraft. For a deep-space craft to reach a predetermined object and make it orbiting, landing or capturing a target, it is necessary to accurately calculate and correct the orbit of the flight. At present, due to the very sophisticated satellite sensor and data processing system, and improved