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    Real-Time Precise Point Positioning Using Orbit and Clock Corrections as Quasi-Observations for Improved Detection of Faults

    264346.pdf (1.265Mb)
    Access Status
    Open access
    Authors
    El-Mowafy, Ahmed
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    El-Mowafy, A. 2018. Real-Time Precise Point Positioning Using Orbit and Clock Corrections as Quasi-Observations for Improved Detection of Faults. Journal of Navigation. 71 (4): pp. 769-787.
    Source Title
    Journal of Navigation
    DOI
    10.1017/S0373463317001023
    ISSN
    0373-4633
    School
    School of Earth and Planetary Sciences (EPS)
    Remarks

    This article has been published in a revised form in Journal of Navigation, http://doi.org/10.1017/S0373463317001023. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works

    URI
    http://hdl.handle.net/20.500.11937/66443
    Collection
    • Curtin Research Publications
    Abstract

    Real-time Precise Point Positioning (PPP) relies on the use of accurate satellite orbit and clock corrections. If these corrections contain large errors or faults, either from the system or by meaconing, they will adversely affect positioning. Therefore, such faults have to be detected and excluded. In traditional PPP, measurements that have faulty corrections are typically excluded as they are merged together. In this contribution, a new PPP model that encompasses the orbit and clock corrections as quasi-observations is presented such that they undergo the fault detection and exclusion process separate from the observations. This enables the use of measurements that have faulty corrections along with predicted values of these corrections in place of the excluded ones. Moreover, the proposed approach allows for inclusion of the complete stochastic information of the corrections. To facilitate modelling of the orbit and clock corrections as quasi-observations, International Global Navigation Satellite System Service (IGS) real-time corrections were characterised over a six-month period. The proposed method is validated and its benefits are demonstrated at two sites using three days of data.

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