Systematic error mitigation in multi-GNSS positioning based on semiparametric estimation

Systematic error mitigation in multi-GNSS positioning based on semiparametric estimation
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基于半参数估计的多GNSS定位系统误差缓解

DOI:
10.1007/s00190-017-1038-6
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发表时间:
2017-05
期刊:
影响因子:
4.4
通讯作者:
Chen W.
Chen W.
中科院分区:
地球科学1区
文献类型:
--
作者:
Yu W.K;Ding X.L.;Dai W.J.;Chen W.

文献摘要

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联合使用多个全球导航卫星系统(GNSS)的观测结果有利于高精度定位。然而,如果观测中的系统误差不能得到适当的缓解,则会对定位精度产生重大影响。这些误差会扭曲最小二乘估计,也会影响方差分量估计的结果,而方差分量估计通常用于在使用多个GNSS观测值时确定随机模型。我们提出了一种基于半参数估计的方法来减轻系统误差的影响。基于仿真和真实GNSS数据集的实验结果表明,该方法是有效的,特别是在进行方差分量估计之前。
Joint use of observations from multiple global navigation satellite systems (GNSS) is advantageous in high-accuracy positioning. However, systematic errors in the observations can significantly impact on the positioning accuracy if such errors cannot be properly mitigated. The errors can distort least squares estimations and also affect the results of variance component estimation that is frequently used to determine the stochastic model when observations from multiple GNSS are used. We present an approach that is based on the concept of semiparametric estimation for mitigating the effects of the systematic errors. Experimental results based on both simulated and real GNSS datasets show that the approach is effective, especially when applied before carrying out variance component estimation.
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