G4 Multi-constellation Precise Point Positioning Service for High Accuracy Offshore Navigation

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.

KEYWORDS: Global Navigation Satellite System (GNSS), Positioning Accuracy, Offshore Navigation, Precise Point Positioning (PPP), High Accuracy Offshore Navigation, Integer-Ambiguity Resolution (IAR), G4 System Architecture, Multi-Constellation Precise Point Positioning Service

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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

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Other publications of authors:

Recent Advances in Wide Area Real-Time Precise Positioning

Journal Vol. 5 No. 1 - March 2011

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

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