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Alternative TitleA Study on Precision Orbit Determination
Thesis Advisor熊耀恒
Degree Grantor中国科学院研究生院(云南天文台)
Place of Conferral北京
Degree Discipline天体测量与天体力学
Keyword精密定轨 激光测距slr 残差分析 综合 单站
Abstract本文系统介绍了人造卫星精密定轨的基本理论和方法,简述了涉及到的时间系统和坐标系统及其间的转换关系,较详细叙述了涉及到的测量模型和动力学模型,并简单介绍了残差分析方法。   基于上述理论,在参考国际上的精密定轨程序的基础上,采用较新的相关模型及参数,作者建立了在云南天文台用于精密定轨的系统POREDY (Precision Orbit Estimate Determination of Yunnan Observatory)。用POREDY对LAGEOS-1/2、Ajisai、Beacon-C四颗卫星进行定轨计算,用残差分析方法进行“野值”剔除,剔除野值后的定轨结果合理可信。进一步的同步比对计算表明,其RMS与美国德克萨斯空间研究中心CSR的结果相当,表明定轨软件POREDY的计算结果是可信的,可以将其广泛应用于各种科学研究。   基于精密定轨软件POREDY,作者研究了基于单站激光测距的卫星轨道改进方法,将高精度的测距资料和在测距过程中实时记录的望远镜跟踪数据(测角资料)综合,以跟踪矢量作为观测量进行定轨运算,既充分利用了激光测距资料的高精度性,并能提高轨道倾角和升交点经度的精度,且无需额外的设备和观测,以LAGEOS-1和Ajisai卫星为对象计算验证了该方法的可行性和有效性。   精密定轨系统POREDY的建立,填补了云南天文台在该研究领域的空缺,基于该软件及其赖以运行的高性能高精度平台可以进行相关的研究,如地心运动的解算、测站坐标的确定、地球定向参数的解算等。
Other AbstractThe principle of POD is introduced systematically in this dissertation. The related time systems and coordinate systems are outlined, including the relation-ship between them, respectively. The measurement models and dynamic models are involved more detailed. And a residual analysis method is briefly described. Based on the above theory, in reference to the international program of POD, using newer models and parameters, Precision Orbit Estimate Determination of Yunnan Observatory (POREDY for short) is established. The PODs of LAGEOS-1/2, Ajisai, Beacon-C are calculated by POREDY. The residual analysis method is used to remove outliers. It appears optimal and reliable after excluding outliers. Further more, the RMS is similar to the results of CSR at Texas over the same period. So that the results of POREDY are reliable, and it can be used widely for a variety of scientific research. Using POREDY, an orbit improvement method is investigated just using single-station SLR observational data. The range data with high precision and the tracking data (that are angular data) of the telescope recorded in the process of the ranging observation are synthesized. The tracking vector is used as the observation. The method takes fully advantage of the high precision of the range data, and can improve the precision of i and Ω. And no other experiments and observations are required. The feasibility and effectiveness are validated by calculating on Ajisai and LAGEOS-1. The establishment of POREDY filled the vacancy in the POD study area of Yunnan Observatory. Based on POREDY, and the high-performance and high-precision platform running it, a variety of studies can be done, such as the motion of the geocenter, station coordinates determination, Earth orientation parameters estimation, etc.
Subject Area天文学
Document Type学位论文
Recommended Citation
GB/T 7714
李荣旺. 基于激光测距的人造卫星精密定轨究[D]. 北京. 中国科学院研究生院(云南天文台),2010.
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