基于脉冲星和双星定位系统的卫星自主定轨  

Autonomous orbit determination based on pulsars and bi-satellite position system

作　　者：丰大军[1] 许录平[1] 张华[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《系统工程与电子技术》2011年第12期2700-2705,共6页Systems Engineering and Electronics

基　　金：国家高技术发展研究计划(863计划)(2007AA12Z323);国家自然科学基金(60772139)资助课题

摘　　要：提出了一种利用X射线脉冲星辐射到达时间(time of arrival,TOA)测量辅助双星定位系统进行轨道卫星迭代定轨方法,建立了双星可见观测弧段内基于双星距离和观测数据与脉冲星辐射TOA测量的组合量测方程,并应用于EKF(extend Kalman filter),针对几种量测值组合进行了仿真实验。结果表明,在双星覆盖轨道周期内利用脉冲星辅助一颗双星和辅助两颗双星迭代定轨精度分别达到了100m和50m水平,而在双星不可见弧段可利用脉冲星进行粗定轨,有效增强了全轨道周期内卫星定轨的自主性。A method of X-ray pulsars assisted bi-satellite positioning system （BPS） orbit determination for earth orbit satellites is presented, and an amalgamation equation based on the ranging mode of BPS and time of arrival （TOA） measurement of pulsars emission is constructed and applied to EKF（extend Kalman filter）. Sire ulation experiments with various measurement combination modes are carried out using some kinds of orbit data. The simulation results show that pulsar assistant orbit determination precision can achieve a level of 100 m using one bi-satellite measurement or 50 m using two bi satellites in the bi-satellite covered region and in uncov ered region, the satellite can also use pulsars to determinate orbit coarsely and the autonomy in all orbit periods can be improved.

关 键 词：X射线脉冲星 双星定位系统 TOA测量 近地卫星 自主定轨 

分 类 号：TN967.1[电子电信—信号与信息处理]