首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation
【2h】

Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation

机译:使用鲁棒的Helmert方差分量估计来改善Multi-GNSS时频传输的性能

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The combination of multiple Global Navigation Satellite Systems (GNSSs) may improve the performance of time and frequency transfers by increasing the number of available satellites and improving the time dilution of precision. However, the receiver clock estimation is easily affected by the inappropriate weight of multi-GNSSs due to the different characteristics of individual GNSS signals as well as the outliers from observations. Thus, we utilised a robust Helmert variance component estimation (RVCE) approach to determine the appropriate weights of different GNSS observations, and to control for the influence of outliers in these observation in multi-GNSS time and frequency transfer. In order to validate the effectiveness of this approach, four time links were employed. Compared to traditional solutions, the mean improvement of smoothed residuals is 3.43% using the RVCE approach. With respect to the frequency stability of the time links, the RVCE solution outperforms the traditional solution, particularly in the short-term, and the mean improvement is markedly high at 14.89%.
机译:多个全球导航卫星系统(GNSS)的组合可以通过增加可用卫星的数量和改善精度对时间的稀释来提高时间和频率传输的性能。但是,由于各个GNSS信号的不同特性以及观察到的异常值,接收机时钟估计很容易受到多GNSS权重不合适的影响。因此,我们利用鲁棒的Helmert方差分量估计(RVCE)方法来确定不同GNSS观测值的适当权重,并控制异常值在多GNSS时间和频率传输中的异常值。为了验证这种方法的有效性,采用了四个时间链接。与传统解决方案相比,使用RVCE方法可以使平滑残差平均提高3.43%。在时间链路的频率稳定性方面,RVCE解决方案优于传统解决方案,尤其是在短期内,其平均改善幅度高达14.89%。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号