| 附加误差修正的GM(1,1)模型在卫星钟差预报中应用 |
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| 引用本文： | 刘铁柱,杨登科,马向向.附加误差修正的GM(1,1)模型在卫星钟差预报中应用[J].测绘工程,2015(1):57-59,63. |
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| 作者姓名： | 刘铁柱 杨登科 马向向 |
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| 作者单位： | 1. 郑州市市政工程勘测设计研究院,河南 郑州,450046;2. 华亭煤业集团公司,甘肃 平凉,744000 |
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| 摘 要： | 提出一种附加误差修正的GM(1,1)模型卫星钟差预报方法:首先采用GM(1,1)模型利用已有观测值建模,然后利用已有的多余观测值得到预报残差,提出一个误差修正模型,最后利用该修正模型对预报结果进行改正。同时,为保证其可靠性,给出一个修正的阈值。计算结果表明,该方法能够大幅度地提高预报精度,尤其是当GM(1,1)模型预报结果有较大系统偏差时。
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| 关 键 词： | 卫星钟差 误差修正 钟差预报 GM(1 1)模型 |
Application of GM(1, 1) model with additional error correction to satellite clock bias forecast |
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| LIU Tie-zhu;YANG Deng-ke;MA Xiang-xiang.Application of GM(1, 1) model with additional error correction to satellite clock bias forecast[J].Engineering of Surveying and Mapping,2015(1):57-59,63. |
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| Authors: | LIU Tie-zhu;YANG Deng-ke;MA Xiang-xiang |
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| Institution: | LIU Tie-zhu;YANG Deng-ke;MA Xiang-xiang;Zhengzhou Municipal Engineering Design & Research Institute;Huating Coal Group; |
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| Abstract: | A new way is proposed which can be used to forecast the clock error by the GM(1 ,1) model with additional error correction .Firstly ,making the GM (1 ,1) model by using observation ,and then using the existing redundant observation to forecast residual error correction model ;finally using the correction model to correct the forecast results .At the same time ,in order to guarantee its reliability ,a fixed threshold is presented . T he result show s that the new method can significantly improve the accuracy , especially that the GM (1 ,1) model forecast results have larger deviation system . |
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| Keywords: | clock error error correction clock error forecasting GM (1 1 ) model |
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