The Use of X-ray Pulsars for Spacecraft Relative Positioning
The relative positioning technique for spacecrafts based on x-ray pulsars is studies in this paper. The TDOA ( Time Difference of Arrival) of x-ray signals from pulsars are adopted as observations , such that the common mode errors between the TOA ( Time of Arrival) measurements from different spacecrafts will be eliminated. And the extended Kalman filter(EKF)is implemented to incorporate the TDOA measurements and the spacecraft dynamics. Further analysis shows that this technique is more effective than the traditional method based on the inter-spacecraft pseudo-range measurements. In addition,if the pseudo-range is used together with the TDOA observations,the positioning accuracy will be improved. Finally, the Cramer-Rao lower bound ( CRLB ) is introduced to illustrate the feasibility of the proposed positioning technique.
Spacecraft Autonomous Navigation Pulsar Eztended Kalman Filter
Xiong Kai Wei Chunling Liu Liangdong
National Laboratory of Space Intelligent Control,Beijing Institute of Control Engineering, Beijing 100080,China
国际会议
The 11th International Space Conference of Pacific-basin Societies(第11届环太平洋国际航天会议)
北京
英文
297-303
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）