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Proceedings Paper

A method for the orbit determination accuracy improvement of a station with a limited motion antenna
Author(s): Fenglei Wu; Jingyong Liu; Yongqing Liu; Yanning Li; Ping Zhu; Liming Du
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Paper Abstract

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 singlestation 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 4σ 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.

Paper Details

Date Published: 2 April 2010
PDF: 7 pages
Proc. SPIE 7651, International Conference on Space Information Technology 2009, 76513C (2 April 2010); doi: 10.1117/12.855620
Show Author Affiliations
Fenglei Wu, Graduate Univ. of the Chinese Academy of Sciences (China)
National Time Service Ctr. (China)
Beijing Aerospace Control Ctr. (China)
Jingyong Liu, Beijing Aerospace Control Ctr. (China)
Yongqing Liu, Beijing Aerospace Control Ctr. (China)
Yanning Li, Beijing Aerospace Control Ctr. (China)
Ping Zhu, Beijing Aerospace Control Ctr. (China)
Liming Du, Beijing Aerospace Control Ctr. (China)


Published in SPIE Proceedings Vol. 7651:
International Conference on Space Information Technology 2009
Xingrui Ma; Baohua Yang; Ming Li, Editor(s)

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