土星卫星的精密定轨方案

THE SCHEME OF PRECISE ORBITAL DETERMINATION OF SATURNIAN SATELLITES

由于星际探测事业的发展 ,对土星卫星的定位精度要求愈来愈高 ,经典的分析法定轨方法已难以适应 ,在当今计算技术条件高度发展的背景下 ,本文给出了土星卫星的数值法定轨方案 ,采用了土星卫星运动的高精度力学模型 ,并运用 1 874- 1 989这 1 0 0多年间的观测资料 ,引用现代最小二乘估计 ,对土星卫星进行精密定轨。该方案可以在引用同样的力学模型的前提下 ,对土星各颗卫星进行定轨 ,亦可同时进行多颗卫星的定轨。相应的软件比较简单 ,有较好的应用前景。

With the development of the exploration of the space, classical analytical methods of orbital determination are difficult to meet the high position precision of Saturnian satellites. We made the scheme of precise orbital determination of Saturnian satellites by numerical methods in the background of developed computational conditions. The dynamical mode of Saturnian satellites is constructed to meet the high precision of orbital determination and the least-square theory is used to precisely determine orbits of Saturnian satellites with observations during the period 1874-1989. The scheme can be used to determine not only the orbit of each Saturnian satellite but also orbits of several satellites at the same time. The related software is simple and has a better applied outlook.