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一种加速精密单点定位收敛的新方法 被引量:11

A New Method for Improvement of Convergence in Precise Point Positioning
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摘要 将自适应选权滤波应用到参数估计中,对于合理地选取未知参数及其方差-协方差阵的初值,提出了利用选权拟合的方法。算例结果表明,采用新方法单点定位可以在较短的时间内达到dm甚至cm级的精度。 The current mathematical model and parameter estimation method in precise point positioning(PPP) are introduced, then the adaptive filtering by selection of the parameter weights in the parameter estimation is applied. The selecting weight fitting method is employed to determine the initial parameters and the corresponding variance-covariance components. Two numerical experiments demonstrate that the position precision can achieve decimeter to centimeter in a short time, and that the feasibility and validity of the new method can be ensured.
出处 《武汉大学学报(信息科学版)》 EI CSCD 北大核心 2007年第10期902-905,共4页 Geomatics and Information Science of Wuhan University
基金 国家自然科学基金资助项目(40474009 40674012) 国家杰出青年科学基金资助项目(40625013) 中国科学院海外杰出学者基金资助项目(2005-1-15)。
关键词 精密单点定位 卡尔曼滤波 选权拟合法 precise point positioning Kalman filtering selecting weight fitting
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