火星非球形引力位田谐项联合摄动分析解

发布时间：2018-12-18 02:11

【摘要】：火星非球形引力场模型与地球有明显差别,其非球形引力位中的田谐项系数基本都要比地球的相应值大一个量级,尤其是J_(2,2)项(赤道椭率项)的大小接近它的动力学扁率项J_2.对于低轨探测器,若要使轨道外推1 d弧段的精度达到500 m(相当于标准单位10~(-4)量级),在构造环火探测器的轨道分析解时,田谐项与J_2项以及田谐项与田谐项之间的联合摄动不容忽视.根据摄动量级分析和构造的摄动分析解证实,上述联合摄动对轨道沿迹方向的影响可超过10~(-4),并给出了数值验证.结果表明,与地球低轨卫星不同,在类似的问题中,构造环火卫星摄动分析解时,必须考虑这些联合摄动项的影响.
[Abstract]:The mars non-spherical gravitational field model is obviously different from the earth, and the coefficients of the field harmonic term in the non-spherical gravitational potential are almost one order of magnitude larger than the corresponding values of the earth In particular, the size of the J _ (2N) term (equatorial ellipticity term) is close to its dynamic flattening term J _ (2). For the low-orbit detector, if the accuracy of the orbit extrapolation 1 day arc segment is to reach 500m (equivalent to the order of 10 ~ (-4) standard unit), the orbit analysis solution of the ring fire detector is constructed. The joint perturbation between the field harmonic term and J _ S term and between the field harmonic term and the field harmonic term can not be ignored. According to the perturbation order analysis and the constructed perturbation analysis solution, it is proved that the influence of the above joint perturbation on the track direction can exceed 10 ~ (-4), and the numerical verification is given. The results show that the influence of these joint perturbation terms must be taken into account in constructing the analytical solutions of the perturbation of ring fire satellites in similar problems as those of Leo satellites.
【作者单位】：南京大学天文与空间科学学院;南京大学空间环境与航天动力学研究所;宇航动力学国家重点实验室;
【基金】：国家自然科学基金项目(11033009) 青年基金项目(11003009) 宇航动力学国家重点实验室资助
【分类号】：P185.3

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