参考架转换参数估计与分析

发布时间：2018-06-08 08:31

本文选题：天体测量学 + 参考架　；参考：《天文学报》2016年04期

【摘要】：在描述不同参考架转换参数估计方法的基础上,利用太阳系行星历表资料估计了近代不同DE(Development Ephemeris)历表之间的转换参数;利用脉冲星计时观测与VLBI(Very Long Baseline Interferometry)技术观测得到的毫秒脉冲星位置资料,估计了基于DE历表的动力学参考架与河外射电源参考架(ICRF)之间的转换参数.给出的不同参考架之间转换参数包括旋转矩阵的3个旋转角及其随时间的变化率,参考历元为MJD51545.结果表明:DE200到DE405历表转换参数的旋转角最大绝对值为13 mas,其随时间变化率为-0.0007 mas/d.DE414到DE421历表转换参数的3个旋转角的绝对值均小于0.1 mas.估计得到的DE421到ICRF转换参数的旋转角最大绝对值为3 mas,旋转角随时间变化率也是必须计及的.
[Abstract]:On the basis of describing the estimation methods of conversion parameters of different reference frames, the conversion parameters among different DED ephemeris in modern times are estimated by using the data of the planetary ephemeris of the solar system. The conversion parameters between the dynamic reference frame based on DE ephemeris and the ICRFF of extragalactic radio source are estimated by using the position data of millisecond pulsars obtained from pulsar timing observations and VLBII-Very long baseline interferometrics. The conversion parameters between different reference frames include three rotation angles of the rotation matrix and their rate of change with time. The reference epoch is MJD51545. The results show that the maximum absolute value of rotation angle of the conversion parameters from: DE200 to DE405 is 13 mas. and the rate of change with time is -0.0007 mas-d. DE414 to DE421. The absolute values of the three rotation angles of the conversion parameters are all less than 0.1 masa. The maximum absolute value of rotation angle of DE421 to ICRF is estimated to be 3 mass. the rate of rotation angle with time must also be taken into account.
【作者单位】：中国科学院国家授时中心;中国科学院时间频率基准重点实验室;中国科学院大学;西安科技大学应用物理系;
【基金】：国家自然科学基金项目(11103024,11373028,11403030,U1531112) 中国科学院“西部之光”青年学者A项目资助
【分类号】：P12

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