CAJ | 학술논문

针对 X 射线脉冲星导航(XPNAV)系统的选星问题，该文研究了脉冲星可见性、品质因子及空间分布对脉冲星优选的影响。分别建立了第三体阴影遮挡，X射线干扰源影响以及X射线探测器视场角限制造成脉冲星不可见的约束方程；分析了基于克拉美罗界的脉冲星品质因子评价公式；提出了脉冲星组合加权几何精度因子(WDOP)的计算方法，并证明了加权几何精度因子值随着脉冲星观测数量的增加而减小。最后设计了一种基于查表法的脉冲星选星方法。仿真结果表明，设计的脉冲星选星方法可以有效地从适合导航的脉冲星中优选出最佳脉冲星组合。
침대 X 사선맥충성도항(XPNAV)계통적선성문제，해문연구료맥충성가견성、품질인자급공간분포대맥충성우선적영향。분별건립료제삼체음영차당，X사선간우원영향이급X사선탐측기시장각한제조성맥충성불가견적약속방정；분석료기우극랍미라계적맥충성품질인자평개공식；제출료맥충성조합가권궤하정도인자(WDOP)적계산방법，병증명료가권궤하정도인자치수착맥충성관측수량적증가이감소。최후설계료일충기우사표법적맥충성선성방법。방진결과표명，설계적맥충성선성방법가이유효지종괄합도항적맥충성중우선출최가맥충성조합。
In order to select the optimal pulsars combination for X-ray Pulsar NAVigation (XPNAV), the influence factors of visibility, quality and space distribution of pulsars are studied. Besides, constraint equations for visibility based on the restrictions of celestial body’s shadow, X-ray disturbance source and detector’s angle of view are built respectively; an evaluation equation for quality factor based on Cramer-Rao low bound is analyzed; the method for calculating Weighted Dilution Of Precision (WDOP), which decreases as the number of observable pulsars increases, is researched. Finally, a method for selecting pulsars based on looking up table is proposed, and its validity is proved by computer simulations.