| 两点求星历表的计算方法 |
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| 引用本文： | 徐劲,师万辉.两点求星历表的计算方法[J].时间频率学报,1993,16(1):32-38. |
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| 作者姓名： | 徐劲 师万辉 |
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| 作者单位： | 中国科学院陕西天文台，中国科学院陕西天文台 |
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| 摘 要： |
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| 关 键 词： | 数值计算 同步卫星 星历表 测距 |
A Computational Method of Using Two Position Data to Make Ephemeris |
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| Xu Jin Shi Wanhui.A Computational Method of Using Two Position Data to Make Ephemeris[J].Journal of Time and Frequency,1993,16(1):32-38. |
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| Authors: | Xu Jin Shi Wanhui |
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| Abstract: | Adams-Cowell method is one of the most efficient numerical methods for making ephemeris of small eccentricity orbit. If the position vector and velocity vector of the celestial body at the same time have been obtained, the ephemeris of the celestial body can be made by means of Adams-Cowell method. This is the way which had been used befor. In this paper, the way of using position data of the celestial body at two different time to make the ephemeris is suggested. The principle is explained and the formulae are listted. By the use of the way it is eaay to form a practical software for making ephemeris with the aid of computer. The simulation computation of using circular orbit (Table 1 and Table 2 )shows the way suggested in thes paper to be efficient. In many cases the way suggested in this paper is convenient to be used. For example, measuring distance is a very important means for determining orbit of satellites. The position of satellite can be computed by using three stations. If the positions of satellite at two different time have been obtained, by using the way, we can make the ephemeris of the satellite easily. The error derivred Iron the way also is analysed. If the interval between the two different time corresponding to two different position of the celestial body. respectively is too short or too long, the way will cease to be efficient. To attain higher accuracy, the interval between the two time will be asked to be moderate. The simulation computation with cicular orbit (Table 3)has shown it. |
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| Keywords: | position data numerical computation ephemeris |
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