| 利用接收机钟差实时滤波提高GNSS精度 |
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| 引用本文： | 甘雨,隋立芬,张鹤,戚国宾,王冰.利用接收机钟差实时滤波提高GNSS精度[J].测绘工程,2014(5):6-8. |
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| 作者姓名： | 甘雨 隋立芬 张鹤 戚国宾 王冰 |
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| 作者单位： | 信息工程大学地理空间信息学院,河南郑州450052 |
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| 基金项目： | 国家自然科学基金资助项目（40974010;41274016;41174006;40971306） |
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| 摘 要： | 建立接收机钟差的高斯马尔可夫模型,通过自相关函数估计接收机钟差的时间常数,利用Allan方差确定模型谱密度参数,将滤波后的接收机钟差返回补偿至GNSS观测方程,重新进行导航解算。实验结果表明,对接收机钟差进行滤波,可有效提高钟差估计精度,提高GNSS的精度。
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| 关 键 词： | 接收机钟差 高斯马尔可夫模型 自相关函数 谱密度 GNSS |
Accuracy enhancement of GNSS by real-time filtering of receiver clock error |
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| GAN Yu,SUI Li-fen,ZHANG He,QI Guo-bin,WANG Bing.Accuracy enhancement of GNSS by real-time filtering of receiver clock error[J].Engineering of Surveying and Mapping,2014(5):6-8. |
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| Authors: | GAN Yu SUI Li-fen ZHANG He QI Guo-bin WANG Bing |
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| Institution: | (School of Geospatial Information, Information Engineering University, Zhengzhou 450052,China) |
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| Abstract: | Receiver clock error is established by Gaussian-Markov model, the time constant of which is estimated by autocorrelation function and the spectral density of the model is determined by Allan variance. The filtered clock error is compensated in the observation equation of GNSS and the navigation calculation is repeated again. The experimental results show that filtering the clock error improves the accuracy of clock error and that of GNSS. |
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| Keywords: | receiver clock error Gaussian-Markov model autocorrelation function spectral density GNSS |
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