基于X射线脉冲星的自主轨道确定

Autonomous orbit determination based on X-ray pulsars

研究基于X射线脉冲星的自主轨道确定问题。构建脉冲到达时(TOA)转换模型和位置增量估计法,并针对整周模糊度和随机噪声问题设计求解算法。实验仿真结果表明:当脉冲到达时测量精度为0.001 ms,脉冲星方位精度为0.000 1 arc sec时,定轨精度可达10 m,完全满足深空探测的精度要求。

Autonomous orbit determination problem based on X-ray pulsars was investigated.Time of arrival(TOA) conversion model and delta-correction of position estimate were proposed to meet the requirements for orbit determination.Solving Algorithms were established to eliminate effects of integer ambiguity and random noises.Simulation results show the orbit determination accuracy can reach 10 m,when the TOA accuracy is 0.001 ms and pulsar direction accuracy is 0.000 1 arc sec.The precision can meet the requirements for deep space exploration.