XPNAV-1卫星先期发布数据的计时分析  

Timing Analysis of Pre-Released Data for XPNAV-1 Satellite

作　　者：朱鸿旭 童明雷[1,2] 杨廷高[1,2] 赵成仕[1,2] 李琳 高玉平[1,2] ZHU Hong-xu;TONG Ming-lei;YANG Ting-gao;ZHAO Cheng-shi;LI Lin;GAO Yu-ping(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Time and Frequency Primary Standards,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049

出　　处：《宇航学报》2019年第12期1492-1500,共9页Journal of Astronautics

基　　金：国家自然科学基金(U1831130,U1531112,11873050);中国科学院“西部之光”青年学者A(XAB2015A06);中国科学院青年创新促进会(2017450)

摘　　要：本文处理了XPNAV-1先期公布的35组Crab脉冲星的观测数据,采用离散傅里叶变换(DFT)方法得到脉冲到达时刻(TOA)及其测量精度。利用英国Jordrell Bank发布的Crab脉冲星星历与美国JPL发布的DE200历表,得到的拟合前计时残差均方根(RMS)为1.14μs,且不存在系统性趋势,从而验证了XPNAV-1观测数据的有效性。同时,得到了该观测数据时间段内Crab脉冲星的X射线和射电波段之间的零点相位差为0.04。本文还给出了建立脉冲轮廓时子相位间隔N的取值与计时残差的RMS之间的关系。The observation data of the Crab pulsar pre-released by XPNAV-1 is processed by the discrete Fourier transform(DFT)method,and the time-of-arrival(TOA)and their measurement uncertainties of the 35 data sets are obtained.The pre-fit timing residuals are figured out by employing the Crab pulsar monthly ephemeris provided by the Jodrell Bank and DE200 ephemeris published by JPL,whose RMS is 1.14μs without systematic trend term.Thus,the validity of the observation data is verified.At the same time,the zero point phase difference between the X-ray and the radio band of the Crab pulsar is 0.04,during the period of the observation data.Besides,in this paper,the relationship between the number N of sub-phase intervals used to construct the pulse profile of the Crab pulsar and the RMS of the timing residuals is also given.

关 键 词：脉冲星导航 XPNAV-1卫星 Crab脉冲星 计时残差 

分 类 号：P129[天文地球—天体测量]