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2 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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Analysis of tropospheric contribution to GPS positioning error during tropospheric cyclone Marcus in 2018

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Sikirica N. , Horvat M. , Špoljar D. , Rumora I.

2020

tom Vol. 14, no. 2

343--348

GNSS positioning performance assessment is essential for sustainable development of a growing number of GNSS-based technology and socio-economic applications. Case-studies of GNSS positioning performance in critical environments and applications scenarios reveals vulnerabilities of the GNSS Positioning, Navigation, and Timing (PNT) services, and suggest mitigation techniques and GNSS application risk containment. Here we address the case of GPS positioning performance during a devastating tropical cyclone Marcus that hit the greater area of the city of Darwin, Australia in 2018. We identified specific statistical properties of time series of tropospheric contribution to GPS northing, easting, and vertical positioning error that may contribute to understanding of tropospheric effects on GPS positioning performance during a massive weather deterioration in maritime and coastal areas, and analysed their adversarial effects on GNSS-based maritime applications.

An experimental identification of multipath effect in GPS positioning error

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Rumora I. , Sikirica N. , Filjar R.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2018

tom Vol. 12, no. 1

29--32

The analysis of the GPS multipath effects in maritime environment is constrained with the practice of traditional GPS receiver design, that prevents access to GPS signals in Base-band Processing Domain. Here we propose and validate a simple method for experimental identification of multipath effect in Navigation Processing Domain, based on spectral characterisation of time series of GPS positioning errors.