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Instantaneous Cycle-Slip Correction for Real-Time PPP Applications

机译:实时PPP应用的瞬时周跳校正

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摘要

Real-time precise point positioning (PPP) is limited to only a few applications using a moving receiver because the quality of the solution is vulnerable to interruptions in signal tracking. A loss of lock on all GPS signals simultaneously implies that users may have to wait for several minutes before again obtaining cm-level precision. To avoid such a scenario, this paper proposes a method to instantaneously mitigate the impacts of signal interruptions and the resulting cycle slips. The approach is based on a time-differenced solution that allows for estimating the size of cycle slips in a least-squares adjustment. Once cycle slips are corrected, the PPP filter can be modified accordingly so as to prevent the occurrence of discontinuities in the positioning time series. The usefulness of the approach is demonstrated in selected applications such as geodynamics and car navigation.
机译:实时精确点定位(PPP)仅限于使用移动接收器的少数应用,因为解决方案的质量容易受到信号跟踪中断的影响。同时失去所有GPS信号的锁定意味着用户可能必须等待几分钟才能再次获得cm级的精度。为了避免这种情况,本文提出了一种方法来瞬时减轻信号中断的影响以及由此产生的周跳。该方法基于时差解决方案,该解决方案允许在最小二乘平差中估计周期转差的大小。一旦校正了周跳,就可以相应地修改PPP滤波器,以防止在定位时间序列中出现不连续性。该方法的实用性在选定的应用程序中得到了证明,例如地球动力学和汽车导航。

著录项

  • 来源
    《Navigation》 |2010年第4期|p.325-334|共10页
  • 作者单位

    University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3;

    University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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