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ISSN 2083-6473
ISSN 2083-6481 (electronic version)
 

 

 

Editor-in-Chief

Associate Editor
Prof. Tomasz Neumann
 

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
www http://www.transnav.eu
e-mail transnav@umg.edu.pl
G4 Multi-constellation Precise Point Positioning Service for High Accuracy Offshore Navigation
1 Fugro Seastar, Oslo, Norway
2 Fugro Chance, Louisiana, Lafayette, USA
3 Fugro Intersite, Leidschendam, Netherlands
ABSTRACT: Fugro is operating a global GNSS infrastructure for the delivery of high-accuracy multi-constellation Precise Point Positioning (PPP) service, named G4. Precise orbit and clock for all global satellite navigation systems are estimated in real-time and broadcast to the users using geostationary satellites. End-users with a G4-enabled receiver are able to obtain sub-decimeter positioning accuracy in real-time. The system has been tailored for offshore applications where a nearby GNSS station is not always readily available. G4 offers seamless integration of GPS, GLONASS, Galileo and BeiDou in the navigation solution, therefore allowing the user to obtain a reliable and accurate position even in challenging environments, especially in presence of interference, scintillation or partial sky visibility. In addition, carrier-phase integer-ambiguity resolution (IAR) is supported, for those users requiring the highest possible navigation accuracy. This paper presents the G4 system architecture and current performance. The benefits of multi-constellation Precise Point Positioning (PPP) are shown in terms of increased availability, robustness and accuracy.
REFERENCES
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Tegedor, J. Lapucha D., Ørpen O., Vigen E., Melgard T., Strandli R. The new G4 service: multiconstellation Precise Point Positioning including GPS, GLONASS, Galileo and BeiDou. Proceedings of the 28th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2015), pp. 1089-1095.
Laurichesse D., Mercier F., Berthias J. and Broca P. (2009). Integer ambiguity resolution of undifferenced GPS phase measurements and its application to PPP and satellite precise orbit determination. Navigation, 56(2):135-149.
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Liu X., Stone M., Memarzadeh Y., Goode M., Tegedor J., Lapucha D., Strandli R. Integer Ambiguity Resolution Enabled RTK and PPP Solutions using GPS and GLONASS observations.
Tegedor J., Lapucha D., Melgård T., Ørpen O., The Galileo contribution to Fugro’s G4 Precise Point Positioning service. European Navigation Conference 2016.
Citation note:
Tegedor J., Ørpen O., Melgard T., Łapucha D., Visser H.: G4 Multi-constellation Precise Point Positioning Service for High Accuracy Offshore Navigation. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 11, No. 3, doi:10.12716/1001.11.03.05, pp. 425-429, 2017

Other publications of authors:

D. Łapucha, K. de Jong, X. Liu, T. Melgard, O. Oerpen, E. Vigen

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