| 一种提高空间实验室定轨精度的方法 |
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| 引用本文： | 张宇,段建锋,陈明,孔静,段成林.一种提高空间实验室定轨精度的方法[J].宇航学报,2016,37(9):1056-1062. |
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| 作者姓名： | 张宇 段建锋 陈明 孔静 段成林 |
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| 作者单位： | 北京航天飞行控制中心，北京100094 |
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| 基金项目： | 国家自然科学基金（11173005，11373013） |
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| 摘 要： | 以近地航天器轨道动力学为基础，建立变阻力系数大气摄动模型，设计了求解变阻力系数的算法。然后利用天宫一号飞行器的测轨数据进行计算，分析了空间实验室飞行高度的轨道特性，其中包括：大气模式密度误差、变阻力系数与空间环境关系、定轨残差和星历误差。在空间环境平静和磁暴的条件下，制定了多种求解变阻力系数的策略，解决了空间实验室长弧段定轨精度受限的问题，并在空间环境平静条件下实现了优于10米的定轨精度，在磁暴条件下实现了优于20米的定轨精度。
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| 关 键 词： | 空间实验室 精密定轨 大气阻力 变分方程 空间环境 精度分析 |
| 收稿时间： | 2015-12-14 |
A Method for Improving the Accuracy of Space Laboratory Orbit Determination |
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| ZHANG Yu,DUAN Jian feng,CHEN Ming,KONG Jing,DUAN Cheng lin.A Method for Improving the Accuracy of Space Laboratory Orbit Determination[J].Journal of Astronautics,2016,37(9):1056-1062. |
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| Authors: | ZHANG Yu DUAN Jian feng CHEN Ming KONG Jing DUAN Cheng lin |
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| Affiliation: | Beijing Aerospace Flight Control Center, Beijing 100094, China |
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| Abstract: | This paper established a variable atmosphere drag coefficients model based on LEO spacecraft orbit dynamics and proposed an algorithm for solving variable atmosphere drag coefficients. After caculating the space laboratory orbit determination accuracy based on the actual tracking data of TG-1 spacecraft, comprehensive analysis is made to density error, the relationships between drag coefficients and space weather data, o-c(observation minus computation) residual and ephemeris error. Different strategies are developed to solve atmospheric drag coefficients under quiet and magnetic storm spatial environment conditions. The problem of long arc orbit determination precision is solved in space laboratory. Base on the calculation results, the algorithm can achieve a better than 10-meter accuracy of orbit determination under quiet spatial environment condition and a better than 20-meter orbit determination accuracy under magnetic storm. |
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| Keywords: | Space laboratory Precise orbit determination Atmospheric drag Variational equation Space weather Precision analysis |
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