中文摘要：

为了保证我国卫星导航系统在失去地面站支持条件下一定时间内维持导航定位能力,弥补区域布站在定轨几何结构及完好性监测方面的缺陷,我国全球卫星导航系统拟采用星间测距/通讯体制。给出了基于星间链路测量体制的分布式定轨算法,并用仿真数据进行了验证。结果表明,在一定数量星间测距链路支持条件下,采用Kalman滤波算法能够满足60d URE优于3m的星座自主定轨精度需求。

英文摘要：

In order to continue to issue the broadcast ephemeris after losing the ground link for some time,the GNSS of our country designs to provide the payload of crosslink ranging and communication.The precision orbit determination and integrity with regional station deploying can also be improved by this crosslink.The paper presents a distributed Kalman filter algorithm of precision orbit determination for inter-satellite range measurement,and the validity of this method is verified by simulating test.It＇s showed that,Supporting by the sufficient number of inter-satellite links,a better than 3 meter URE precision of satellite orbit can be meet during 60 day.