利用统计方法判断中天观测数据的参考星表

发布时间：2018-07-08 17:07

本文选题：天体测量学 + 星表　；参考：《天文学报》2014年05期

【摘要】：中天观测数据在建立太阳系高精度行星历表时具有重要作用.在处理由JPL(Jet Propulsion Laboratory)以及IMCCE(Institut De Mecanique Celeste Et De Calcul Des Ephemerides)提供的中天数据时发现,有若干组数据的参考星表没有被明确指出。对于这些信息不完整的数据,无从改正数据由参考星表而引起的系统差。课题研究的主要目的是利用DE421历表确定存在缺陷的这类观测数据的参考星表。通过DE421给出行星在GCRS(Geocentric Celestial Reference System)中的相应位置,并把此位置转换到参考假定的参考星表时行星的理论视位置。通过引入的两个统计量分析原始数据与理论位置的差异显著性,检验假定的数据参考星表是否恰当.结果显示,此方法能够有效区分数据的参考星表,能够确定信息不完整的数据组缺少的参考星表。最后,所有中天数据被转换到GCRS坐标系,以便在历表研制中使用。
[Abstract]:The medium-sky observation data play an important role in the establishment of the solar system's high precision planetary ephemeris. In processing the medium-sky data provided by JPL (Jet Propulsion Laboratory) and IMCCE (Institut de Mecanique Celeste et de Calcul des Ephemerides), it is found that there are several groups of data whose reference catalogs are not clearly indicated. For incomplete data, there is no way to correct the system error caused by the reference catalog. The main purpose of this paper is to use DE421 calendar to determine the reference catalogue of this kind of observation data. The corresponding position of the planet in GCRS (Geocentric Celestial reference system) is given by DE421, and the theoretical apparent position of the planet is converted to the assumed reference catalog. By analyzing the significance of the difference between the original data and the theoretical position, the proposed two statistics are used to test the appropriateness of the assumed reference catalog. The results show that this method can effectively distinguish the reference catalog of the data, and can determine the missing reference catalog of the incomplete data set. Finally, all medium-day data are converted to GCRS coordinates for use in calendar development.
【作者单位】：中国科学院紫金山天文台;中国科学院大学;
【基金】：国家自然科学基金项目(11178006)资助
【分类号】：P114

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