【摘 要】
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The orbit determination of the navigation constellation is the premise for navigation satellite system to realize navigation and position.Autonomous orbit determination based on ground anchor stations
【机 构】
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College of Mechatronics Engineering and Automation, National University of Defense Technology, Chang
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The orbit determination of the navigation constellation is the premise for navigation satellite system to realize navigation and position.Autonomous orbit determination based on ground anchor stations can improve the accuracy and survivability of the navigation system,but it has the rotation error.The addition of the ground anchor stations is a valid way to solve the problem.And because of the limited calculation resources on the satellite boards,the algorithm should be a distributed one which however is not the optimal.So it is meaningful to study the in-fluence of the ground anchor stations on the distributed orbit determination algo-rithm.According to the requirement,first,this article describes the principle of distributed orbit determination algorithm.Second,it analyses the characteristics of it.Third,it studies the effect of ground anchor stations.In the last,it designs a work way in period and test the feasibility of it.The simulation result shows that ground anchor stations can control the rotation error well,but the simple EKF algorithm used to fuse the data of inter-satellite and satellite-to-ground range mea-surements constricts slow.In the last an improving algorithm is raised.
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