| 星地无线电双向法时间比对计算模型及其误差评估 |
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| 引用本文： | 刘晓刚,张传定.星地无线电双向法时间比对计算模型及其误差评估[J].宇航计测技术,2009,29(6):49-53. |
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| 作者姓名： | 刘晓刚 张传定 |
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| 作者单位： | 1. 信息工程大学测绘学院,郑州,450052;武汉大学卫星导航与定位教育部重点实验室,B类,武汉,430079
2. 信息工程大学测绘学院,郑州,450052 |
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| 基金项目： | 国家自然科学基金资助项目，全国优秀博士学位论文作者专项基金，卫星导航与定位教育部重点实验室(B类)开放基金，中科院动力大地测量学重点实验室开放基金，解放军信息工程大学博士生创新基金 |
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| 摘 要： | 卫星导航定位系统测距的基础是测时，而定轨和定位的前提是各观测量的时间同步。因此，时间同步技术是卫星导航定位系统建设的关键技术基础之一。根据星地无线电双向法时间同步技术的基本原理，详细推导了其在地心惯性系中的基本计算模型，并以静止地球同步轨道卫星为例，分析了该计算模型中的距离改正项时延对星地间相对钟差的影响量级。
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| 关 键 词： | 地心惯性系 钟差 时间同步 地球同步卫星 时间比对 |
The Computational Model of the Method of Two-way Satellite-Ground Time Comparison by Wireless Radio and Its Error Evaluation |
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| LIU Xiao-gang,ZHANG Chuan-ding.The Computational Model of the Method of Two-way Satellite-Ground Time Comparison by Wireless Radio and Its Error Evaluation[J].Journal of Astronautic Metrology and Measurement,2009,29(6):49-53. |
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| Authors: | LIU Xiao-gang ZHANG Chuan-ding |
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| Institution: | LIU Xiao-gang ZHANG Chuan-ding ( 1. Institute of Surveying and Mapping, Information and Engineering University, Zhengzhou 450052 ; 2. Key Laboratory of GNSS Research( Wuhan University), Ministry of Education, WuHan 430079) |
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| Abstract: | The basis of range measurement in the satellite navigation and positioning system is time measurement, and the precondition of orbiting and positioning is time synchronization of all the observations.Therefore, time synchronization is one of the pivotal technologies in satellite navigation and positioning system. According to the principle of the method of two-way satellite and ground time comparison by wireless radio, the computational model of the method of two-way satellite and ground time comparison by wireless radio in the ECI has been deduced. Taking the geostationary satellite for example, the quantity level of the influence of every item in the distance correction time delay of the computational model to the relative satellite-ground time difference has been analyzed. |
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| Keywords: | Earth-centered inertial reference frame (ECI) Clock difference Time synchronization Geostationary satellite Time comparison |
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