| X射线脉冲星导航几何法确定航天器位置 |
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| 引用本文： | 毛悦, 宋小勇. X射线脉冲星导航几何法确定航天器位置[J]. 武汉大学学报 ( 信息科学版), 2009, 34(7): 790-793. |
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| 作者姓名： | 毛悦 宋小勇 |
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| 作者单位： | 1信息工程大学测绘学院,郑州市陇海中路66号450052;2西安测绘研究所,西安市雁塔路中段1号,710054 |
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| 基金项目： | 国家自然科学基金资助项目(40604003) |
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| 摘 要： | 给出了X射线脉冲星导航中,利用单差、双差观测量根据几何法确定航天器位置的基本方法。通过仿真试算,重点分析了各类误差项对位置确定精度的影响。
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| 关 键 词： | X射线脉冲星导航 脉冲到达时间 绝对定位 |
| 收稿时间： | 2009-05-17 |
| 修稿时间： | 2009-05-17 |
Spacecraft Position Determination with X-ray Pulsar Navigation of Geometric Methods |
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| MAO Yue, SONG Xiaoyong. Spacecraft Position Determination with X-ray Pulsar Navigation of Geometric Methods[J]. Geomatics and Information Science of Wuhan University, 2009, 34(7): 790-793. |
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| Authors: | MAO Yue SONG Xiaoyong |
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| Affiliation: | 1 Institute of Surveying and Mapping,Information Engineering University,66 Middle Longhai Road,Zhengzhou 450052,China;2 Xi'an Research Institute of Surveying and Mapping,1 Middle Section,Yanta Road,Xi'an 710054,China |
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| Abstract: | Geometric methods of spacecraft position determination using single phase and double difference measurements in X-ray pulsar navigation are introduced.Through simulating calculation,the influence of errors on precision of position determination are analysed.The influence of phase error is very large.The error of range measurement,ephemeris and clock offset can all lead to 102 m position determination error.Double difference can eliminate the influence of clock offset but magnifies the ephemeris error.The decrease of position error with the increase of the number of observed pulsar is related to the influence of range measurement error. |
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| Keywords: | X-ray pulsar navigaiton time of arrival absolute location |
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