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Research on Centralized Autonomous Orbit Determination Algorithm for Beidou Satellites
LIN Xia, LIN Baojun, LIU Yingchun, BAI Tao, WU Guoqiang, WANG Zhengkai
Journal of Jilin University (Information Science Edition). 2020, 38 (4):
428-432.
Due to the limitation of on-board processing capacity,Beidou satellite uses the distributed algorithm to
realize inter-satellite link autonomous orbit determination. Since the distributed orbit determination algorithm can
only acquire sub-optimal solution,to improve the accuracy of Beidou satellite autonomous navigation algorithm,
the realization method of the centralized orbit determination algorithm for Beidou satellitesis studied. A
centralized orbit determination algorithm based on extended Kalman filter algorithm is proposed and the on-orbit
realization process of the algorithm is designed. Finally,the algorithm accuracy and engineering feasibility are
evaluated by using the LONGXIN 1E300 processor on Beidou satellites. The simulation results show that the
accuracy of the whole network centralized algorithm is better than that of the distributed navigation algorithm. The
simulation on the LONGXIN 1E300 processor shows that the centralized navigation algorithm has met the
requirements for satellite application.
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