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传统的X射线脉冲星导航系统需要同时观测3~4颗脉冲星,有效载荷的质量和功耗极大.针对航天器环地飞行中受地球遮挡、探测器可探测范围等因素影响,导致脉冲星并非所有时刻均可见的现象,提出了单探测器分时段实时观测脉冲星的导航方法.根据航天器的实际飞行情况,系统分析探测器在不同探测范围下对脉冲星实时的可见性状况,从每时段的可见星中选取单星进行导航.仿真表明,该方法可大大提高单探测器的导航性能,导航位置误差达到337m,同时有效地减小了导航系统的重量,为X射线脉冲星导航的工程实现提供了参考依据.
The traditional X-ray pulsar navigation system needs to observe 3 ~ 4 pulsars at the same time, the quality and power consumption of the payload is very great.For the spacecraft in the earth-shaded spacecraft, the detector can detect the range and other factors, resulting in pulses According to the actual flight conditions of the spacecraft, the real-time visibility of the pulsar under different detection ranges is systematically analyzed. The real-time observation of the pulsars, The single-star navigation is selected from the visible stars in each period.The simulation results show that this method can greatly improve the navigation performance of the single-detector, the navigation position error reaches 337m, and effectively reduce the weight of the navigation system, Navigation project provides a reference.