木星探测器轨道计算中的动力学

Dynamics in Orbital Determination of Jupiter Spacecraft

针对木星探测任务中轨道计算所面临的轨道动力学问题进行研究。首先,对木星探测轨道计算中涉及的时空参考系进行概述,比较了木星动力学时(TDJ)与质心动力学时(TDB)的差异;其次,对木星的定向参数模型及转换关系进行描述,给出了木星天球参考系与固联参考系的转换关系;再次,对木星探测器定轨计算中所需考虑的动力学模型进行讨论,提供了各类摄动加速度计算所需的公式;最后,对木星探测器JUNO的星历数据进行动力学拟合,检验了动力学模型的正确性。

The orbital dynamics in the orbit determination of Jupiter spacecraft is studied in this paper.Firstly,the space-time reference systems involved in the Jupiter orbit determination are summarized,and the differences between the Jupiter dynamic time(TDJ)and the barycentric dynamical time(TDB)are compared.Secondly,the orientation parameters of the Jupiter are described,and the relationship between the Jupiter’s celestial reference system and the body-fixed reference system is given.Thirdly,the dynamical models for Jupiter spacecraft orbit determination is discussed,and the perturbation formulations are given.Finally,the ephemeris data of JUNO are fitted by the dynamical method to verify the dynamic models.