Centralized Autonomous Orbit Determination of Beidou Satellites Under the Constraint of Anchor Station
作者单位：Information Engineering University Shanghai Astronomical ObservatoryChinese Academy of Science Beijing Satellite Navigation Center State Key Laboratory of Geodesy and Earth's Dynamics
会议名称：《第九届中国卫星导航学术年会》
会议日期：2018年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
关 键 词：Beidou Navigation Satellite System Inter-Satellite Link autonomous orbit determination anchor station observation frequency
摘 要：Autonomous Navigation Based on Inter-Satellite Link(ISL) is a hot spot in the future development of satellite navigation *** new generation Beidou navigation satellites are equipped with Ka-band ISL test verification *** processing flow of ISL observation data and the algorithm of centralized orbit determination are *** of centralized orbit determination for 3 day arcs is carried out with measured data of five new generation BD satellites and an anchor *** 4 experiments were carried out on the effect of anchor ***,some 2 experiments were carried out on the effect of observation *** result shows that:a) The working time length of anchor station has little influence on the accuracy of orbit determination;b) When the intersatellite observation is healthy,the anchor station and single satellite chain can maintain the orbit determination accuracy of 1 m,otherwise the improvement of anchor station’s observation quantity will not improve its constraint function.c) When the anchor station is well linked to all the satellites,the centralized algorithm can survive a lower number of observations,which means the orbit determination accuracy can remain being better than 1 m even though all links’ observational frequencies dropped to 240 minutes.