论文部分内容阅读
在X射线脉冲星自主导航(XNAV)中,位置观测方程表达了X光子到达航天器的时刻(TOA)和航天器位置的关系.具体讨论时,一般用TOA和“时间基准”的差值代替TOA,用太阳系质心系中的位置矢量表示航天器的位置.“时间基准”可以取X光子到达太阳系质心(SSB)的真实时间,也可以取X光子到达SSB的“等效时间”.讨论了基于这两种时间基准的位置观测方程,给出了时间精度为0.1 ns的位置观测方程,分析了其中各项的物理意义.
In XNAP, the position observation equation expresses the relationship between the time of arrival (TOA) of the X-photon and the position of the spacecraft. In the specific discussion, the difference between TOA and “time reference Value instead of TOA, the position vector in the centroid system of the solar system is used to represent the position of the spacecraft. ”The“ time base ”can take the real time for an X photon to reach the center of the solar system (SSB) or the“ equivalent ”for an X photon to reach the SSB Time ". The position observation equation based on these two time references is discussed. The position observation equation with time accuracy of 0.1 ns is given and the physical meaning of each item is analyzed.