| 灰色系统模型在卫星钟差预报中的应用 |
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| 引用本文： | 崔先强,焦文海.灰色系统模型在卫星钟差预报中的应用[J].武汉大学学报(信息科学版),2005,30(5):447-450. |
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| 作者姓名： | 崔先强 焦文海 |
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| 作者单位： | 西安测绘研究所,西安市雁塔路中段1号,710054 |
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| 基金项目： | 国家863青年创新基金资助项目(2002AA717011)，国家自然科学基金资助项目(40274002,40474001) |
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| 摘 要： | 分析了二次多项式模型在卫星钟差长期预报中的缺陷，依据灰色系统理论和卫星钟差的变化规律，以较少的观测样本建立了预报卫星钟差的灰色预测模型，并将其与二次多项式预测模型进行分析比较。计算结果表明，两者的短期预报精度基本相当，而灰色系统模型的长期预报精度要明显地优于二次多项式模型，更适合于实际应用。
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| 关 键 词： | 灰色系统 卫星钟差 二次多项式 |
| 文章编号： | 1671-8860(2005)05-0447-04 |
| 修稿时间： | 2005年2月26日 |
Grey System Model for the Satellite Clock Error Predicting |
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| CUI Xianqiang,JIAO Wenhai.Grey System Model for the Satellite Clock Error Predicting[J].Geomatics and Information Science of Wuhan University,2005,30(5):447-450. |
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| Authors: | CUI Xianqiang JIAO Wenhai |
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| Institution: | CUI Xianqiang 1 JIAO Wenhai 1 |
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| Abstract: | The shortcomings of quadratic polynomial model are analyzed in secular predicting satellite clock error. Based on the gray system theory and changing law of clock error, the gray predicting model is established by making use of a few observation examples. Its result is compared with quadratic polynomial model. Calculating results show that the short-term predicting precision of the two models is almost same, but the gray predicting model remarkably improves the secular predicting accuracy of satellite clock error, so the gray predicting model is fitter to be used in practice. |
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| Keywords: | gray system satellite clock error quadratic polynomial |
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