| HY-2卫星精密轨道拟合与外推的两种方法比较 |
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| 引用本文： | 高鹏,乔学军,范城城.HY-2卫星精密轨道拟合与外推的两种方法比较[J].海洋测绘,2013,33(4):58-61. |
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| 作者姓名： | 高鹏 乔学军 范城城 |
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| 作者单位： | 1. 中国地震局地震研究所,湖北武汉430071;中国地震局地震大地测量重点实验室,湖北武汉430071
2. 中国科学院测量与地球物理研究所,湖北武汉,430077 |
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| 摘 要： | 分别采用切比雪夫曲线和最小二乘曲线拟合HY-2(海洋二号)卫星精密轨道,并进一步解算速度场与预报轨道。结果表明:最小二乘曲线拟合结果明显优于切比雪夫曲线拟合结果,拟合轨道精度为1～2cm,拟合速度场精度为1～2cm/s,且可以进行轨道短期预报,预报轨道精度与拟合轨道精度相当。
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| 关 键 词： | 全球导航卫星系统 HY-2 拟合轨道 切比雪夫曲线 最小二乘曲线 |
Comparison of Two Methods of HY-2 Satellite Precision Orbit Fitting and Extrapolation |
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| GAO Peng,QIAO Xuejun,FAN Chengcheng.Comparison of Two Methods of HY-2 Satellite Precision Orbit Fitting and Extrapolation[J].Hydrographic Surveying and Charting,2013,33(4):58-61. |
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| Authors: | GAO Peng QIAO Xuejun FAN Chengcheng |
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| Institution: | 3 ( 1. Institute of Seismology, CEA, Wuhan 430071, China ;2. Key Laboratory of Earthquake Geodesy, Wuhan 430071, China; 3. Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China) |
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| Abstract: | This paper mainly studies the use of Chebyshev curve and least squares curve to fit the HY-2 satellite precise orbit, as well as the further velocity field solving and the track forecasting. The results show that the least squares curve fitting results are significantly better than the Chebyshev curve fitting results, and the fitting orbit accuracy can reach 1 to 2cm, the fitting speed accuracy can reach 1 to 2cm/sec, and it can also make short-term forecast, the forecast track accuracy is the same with fitting orbital accuracy. |
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| Keywords: | GNSS HY-2 fitting track Chebyshev polynomial least squares polynomial |
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