A Method for the Orbit Determination Accuracy Improvement of a Station with a Limited Motion Antenna
A station with limited motion antenna is usually used for the on-orbit control of a geostationary satellite. In order to enhance the capability of running a satellite, it is important to improve the orbit determination accuracy of the single-station system. This paper presents a method for the orbit determination accuracy improvement with tracking and ranging data from a single station. This method includes two steps. The first step is improving antenna tracking accuracy by optimizing step tracking algorithm. Using big antennas or selecting mono-pulse tracking devices were paid more attention to improve tracking accuracy, which played an important role to reach good orbit determination accuracy in an orbit measurement campaign of a single station. While the influence of the antenna control unit software on orbit determination accuracy was neglected. This paper puts forward that the reformed tracking algorithm of the antenna control unit brings big improvement on tracking accuracy, which is derived from the comparison of orbit measurement results before and after software updating. The second step is to optimize the parameter settings of the orbit determination software. Reasonable weighted values are needed for orbit determination when using tracking and ranging data with different accuracies. Setting the weighted values according to their residual results of the orbit determination can utilize the measurement data with high precision sufficiently. The principal of 4a should be adopted in eliminating limit setting of measurement data, which can make more than 99.98% data available. The orbit determination accuracy can be improved remarkably through the above method. For example, the orbit determination accuracy of a single station with a 13m limited motion antenna can achieve three-sigma position accuracy within 2km.
Orbit Determination Limited motion Step tracking Accuracy Weighted values
Wu Fenglei Liu Jingyong Liu Yongqing Li Yanning Zhu Ping Du Liming
Graduate University of Chinese Academy of Sciences, Beijing, China National Time Service Center, Chi Beijing Aerospace Control Center, Beijing, China Beijing Aerospace Control Center,Beijing, China Beijing Aerospace Control Center, Beijing,China
国际会议
International Conference on Space Information Technology 2009(2009年第三届空间信息技术国际会议)
北京
英文
1-7
2009-11-26（万方平台首次上网日期，不代表论文的发表时间）