基于星间无线电测距的卫星自主定轨与导航

提出了在空间数据链中基于星载无线电测距实现低轨卫星的自主定轨方法。通过星上天线发送和接收网内其他卫星的通信数据，从中获取相互间的距离信息，应用推广Kalman算法确定卫星的位置和速度，实现卫星间的互相定位。以铱系统为背景，针对所提出的两种不同组网方式进行了具体的仿真，并与GPS定轨相比较，得出了几点结论。

Satellite autonomous orbit determination and navigation based on wireless distance measurement on-board

The autonomous orbit determination approach for LEO satellite using on board wireless distance measurement in the spatial data chains is presented.The mutual distances can be obtained through the ephemeris data received from satellite transponder,using extended kalman filtering algorithm to determine the satellite position and velocity vectors,the satellites orbit determination in spatial network can be achieved.Based on the IRIDIUM system,the results of estimated orbit error are simulated under two deferent spatial framework modes,compared with the GPS orbit determination.A few conclusions are provided in the end.