| 引用本文: | 刘光明,廖瑛,文援兰,等.导航卫星广播星历参数拟合算法研究.[J].国防科技大学学报,2008,30(3):100-104.[点击复制] |
| LIU Guangming,LIAO Ying,WEN Yuanlan,et al.Research on the Fitting Algorithm of Broadcast Ephemeris Parameters[J].Journal of National University of Defense Technology,2008,30(3):100-104[点击复制] |
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| 导航卫星广播星历参数拟合算法研究 |
| 刘光明, 廖瑛, 文援兰, 朱利伟 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 基于GPS广播星历参数，研究了导航卫星广播星历参数的非线性最小二乘拟合算法，并推导了相应的计算公式。针对静止轨道卫星轨道倾角近似为0，致使卫星轨道的升交点定义模糊，在数据拟合过程中会导致法矩阵(HTH)奇异的问题，提出对卫星轨道进行轨道倾角变换拟合广播星历参数的方法，并获得较高的拟合精度。最后利用实际算例验证了所推公式和算法的合理性。 |
| 关键词: 广播星历参数 最小二乘拟合 静止轨道卫星 轨道倾角变换 |
| DOI： |
| 投稿日期：2007-09-13 |
| 基金项目:国家自然科学基金资助项目(10573041) |
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| Research on the Fitting Algorithm of Broadcast Ephemeris Parameters |
| LIU Guangming, LIAO Ying, WEN Yuanlan, ZHU Liwei |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Based on the GPS broadcast ephemeris parameters, the nonlinear least square fit algorithm of broadcast ephemeris parameters was developed, and the relevant calculation formulas were derived. Since geostationary satellite's orbit inclination is equal to zero approximately, it will result in the ambiguity of satellite's orbit ascending node and the singularity of the normal matrix in the process of fitting. By transforming the geostationary satellite's orbit inclination, the accuracy of broadcast ephemeris was achieved. Finally, the rationality of formulas and algorithm were validated by simulation. |
| Keywords: broadcast ephemeris parameters least square fit geostationary satellite inclination transformation |
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