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ASTROD 1中的轨道计算与望远镜前指量研究
宋凤刚
Subtype硕士
Thesis Advisor熊耀恒
2007-06-08
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轨道设计 前指量 激光天文动力
Abstract单航天器激光天文动力学空间计划ASTROD 1是激光天文动力学ASTROD的第一步,通过发射绕太阳的无拖曳航天器,通过与地面站进行深空激光测距的方法,精确探讨天文动力学,检测相对论与时空基本定律,改进探测引力波的灵敏度以及更准确地测定太阳、行星和小行星参数[1]。 本文主要利用牛顿定律,考虑了太阳、八大行星和冥王星、冥王星、月球和Ceres, Pallas, Vesta三颗最大的小行星以及后牛顿效应,建立了简单行星历表框架。在这个框架下,设计了ASTROD 1中2015年航天器的轨道,并计算了航天器的轨道精度。当航天器处于太阳背面附近时,地面站和航天器之间进行激光测距。由于此时地面站和航天器之间距离在2AU左右,为了成功的完成激光测距,本文确定了激光测距的时间,计算了望远镜的指向和望远镜的前指量,得到前指时间和前指角度分别为700秒和30角秒左右,并根据激光弥散斑和轨道精度之间的关系,判断航天器轨道精度是否满足航天任务的需要。另外,本论文也对ASTROD 1中的航天器以及地面站作了简要介绍。
Other AbstractAs a first step of ASTROD (Astrodynamical Space Test of Relativity using Optical Devices), ASTROD I is to have one spacecraft launched to a solar orbit to range optically with ground station to test the experimental project for ASTROD and to meet important scientific goals. These scientific goals include an improvement in measuring solar-system parameters, a better precision of spacetime, and a slightly better for detecting gravitational waves. Considerded Newtonian Law, Sun, 8 large planets, Pluto, Moon ,3 asteroids(Ceres, Pallas, Vesta), and post-Newtonian effect, a Planet ephemeris and the spacecraft’s orbit in 2015 are researched. Because a laser beam is transmitted to the spacecraft which will be near the other side of the sun and the laser takes about several hundres seconds to fly from a ground station to the S/C, the Telescope Pointing Ahead is considered. This paper presents the way of estimate the orbit precision if fills the mission, the relation between the Telescope Pointing Ahead and the position of the earth and the spacecraft, and the mission time and the telescope pointing ahead are fixed . Another, the spacecraft and the earth station are introduced in this paper.
Subject Area天文学
Pages44
Language中文
Document Type学位论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7344
Collection应用天文研究组
Recommended Citation
GB/T 7714
宋凤刚. ASTROD 1中的轨道计算与望远镜前指量研究[D]. 北京. 中国科学院研究生院(云南天文台),2007.
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