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北斗导航系统非常复杂,它集导航定位双向简短数字报文通信和高精度授时于一身,还要具备一定的保密、抗干扰和抗摧毁的能力,技术上要求非常高,具有高精度测距指标难实现,高精度原子钟难研制,星座连续稳定运行难维持,产品一致性难保证,高密度发射风险大等难点。仅技术上导航卫星就涉及到偏航控制技术、高精度铷钟、二浮陀螺组件、铷钟精密热控技术、扩频应答机等12项关键技术;星座多种轨道环境复杂,卫星星座是由三种类型轨道组成的混合星座系统,每个轨道的特性都不同,特别是中圆轨道卫星的轨道辐射环境非常复杂,因此,整个系统建设充满着挑战。
Beidou navigation system is very complex, it combines two-way navigation and positioning of short digital message communication and high-precision timing in one, but also have a certain degree of confidentiality, interference and anti-destruction ability, the technical requirements are very high, with high precision ranging Difficult to achieve, difficult to develop high-precision atomic clock, Constellation continuous stable operation difficult to maintain, product consistency is difficult to guarantee, high-density launch risk and other difficulties. Only navigation satellite technology involves 12 key technologies of yaw control technology, high-precision rubidium clock, two floating gyro components, rubidium clock precision thermal control technology, spread spectrum transponder; constellation a variety of orbital environment complex satellite constellation is The hybrid constellation system composed of three types of orbits has different characteristics of each track. Especially, the orbital radiation environment of a medium-orbit orbit satellite is very complicated, and therefore, the entire system construction is full of challenges.