| 利用X射线源实现航天器相对定位 |
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| 引用本文： | 毛悦,宋小勇,贾小林,吴显兵.利用X射线源实现航天器相对定位[J].空间科学学报,2009,29(5):508-514. |
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| 作者姓名： | 毛悦 宋小勇 贾小林 吴显兵 |
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| 作者单位： | 信息工程大学测绘学院;西安测绘研究所; |
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| 摘 要： | 利用X 射线源实现航天器相对定位, 突破了X 射线脉冲星绝对定位中需要选取具有稳定周期脉冲星的限制, 通过周期脉冲信号及非周期时变信号互相关时差测量仿真试算, 得出信号变化幅度是影响时延测量精度的重要因素. 在分析测距和星历误差对相对定位精度影响的基础上, 利用脉冲星数据库中提供的脉冲星参数, 对同时观测3~6 颗脉冲星的相对定位精度进行了试算.
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| 关 键 词： | X 射线源 相对定位 DOP 互相关 |
| 收稿时间： | 1900-01-01 |
Spacecraft Relative Positioning Using X-ray Source |
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| MAO Yue SONG Xiaoyong JIA Xiaolin WU Xianbing.Spacecraft Relative Positioning Using X-ray Source[J].Chinese Journal of Space Science,2009,29(5):508-514. |
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| Authors: | MAO Yue SONG Xiaoyong JIA Xiaolin WU Xianbing |
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| Institution: | 1;2;Institute of Surveying and Mapping;Information Engineering University;Zhengzhou 450052;Xi'an Research Institute of Surveying and Mapping |
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| Abstract: | The basic principles of spacecraft relative positioning using X-ray source are presented in this paper.This method can break through the restriction of X-ray pulsar absolute positioning which must select steady periodical pulsars.Time differences are simulated using cross-correlation periodic pulse signal and aperiodic changing signal.Results can be derived from the fact that the change amplitude of signals have significant influence on the precision of time difference measurement. The influences of range a... |
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| Keywords: | X-ray source Relative positioning Dilution of precision Cross-correlation |
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