| 摘要: |
| 恒星视位置计算是上面级天文导航星库建立的基础。首先，在国际天文联合协会（IAU）工具箱的基础上，介绍了恒星视位置计算中的各个数学模型，并设计了视位置计算的算法；然后，对某些特定星表进行处理，获得相应恒星的标准星历信息，对这些恒星采用本文的视位置算法进行视位置计算；最后，将计算结果与专业的天文软件及中国天文年历进行比较，来验证本文视位置算法的精度。计算结果表明：本文提出的视位置算法具有较高的精度(0.03″级别)，满足上面级天文导航的要求。另外，本文通过对视位置误差的分析，给出了各种误差因素对视位置计算精度的影响。 |
| 关键词: 上面级 天文导航 恒星视位置 星表 |
| DOI： |
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| 基金项目: |
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| Research on Star Apparent Position Algorithm in Celestial Navigation of Upper Stage |
| LI Chaobing |
| (Beijing Aerospace Automatic Control Institute) |
| Abstract: |
| Star apparent position calculation is a fundamental component in the celestial navigation of upper stage. Firstly，this paper introduces various mathematical models in the calculation of star apparent position and designs the algorithm of star apparent position on the basis of tools of International Astronomical Union(IAU). Then， this paper obtains some stars standard catalog information through processing star catalogs and calculates these stars apparent position through the algorithm. Finally， this paper compares the calculation results with the professional stellar software and Chinese Astronomic Almanac to verify the algorithm's accuracy. This paper's star apparent algorithm has high precise accuracy and meets the requirement of upper stage celestial navigation. The accuracy is approximate 0.03″. In addition， this paper analyzes impact of all kinds of factors to the calculation results through error analysis. |
| Key words: Upper stage Celestial navigation Star apparent position Star catalog |