GALILEO and GPS Performances in the Maritime Environment

Pandele, Alexandru; Croitoru, Antonia; Hulea, Andrei; Cherciu, Costel; Radutu, Alina; Porretta, Marco; Buist, Peter J.; Andrescu, Dumitru; Dutu, Lucian; Dragasanu, Claudiu; Trusculescu, Marius; Balan, M. G.

doi:10.33012/2020.17731

Cited by 1 publication

(1 citation statement)

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“…When it comes to studies conducted in the past on the accuracy for marine applications achieved in real time by GNSS standalone and with the addition of augmentations, review of the literature indicates that GNSS standalone accuracy is in the order of a few meters [10] and performance is slightly improved to submeter accuracy with the use of DGNSS [11] or SBAS [12], and to centimeter accuracy using commercial services or postprocessing [13].…”

Section: Galileo In Marine Navigationmentioning

confidence: 99%

Testing Galileo High-Accuracy Service (HAS) in Marine Operations

Pintor,

Lopez-Martinez,

Gonzalez

et al. 2023

JMSE

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Global Navigation Satellite System (GNSS) technology supports all phases of maritime navigation and serves as an integral component of the Automatic Identification System (AIS) and, by extension, Vessel Traffic Service (VTS) systems. However, the accuracy of standalone GNSS is often insufficient for specific operations. To address this limitation, various regional and local-area solutions have been developed, such as Differential GNSS (DGNSS), Satellite Based Augmentation Service (SBAS) and Real Time Kinematic (RTK) techniques. A notable development in this field is the recent introduction of the Galileo High-Accuracy Service (HAS), which saw its initial service declared operational by the European Commission (EC) on 24 January 2023. Galileo HAS provides high-accuracy Precise Point Positioning (PPP) corrections (orbits, clocks and signal biases) for Galileo and GPS, enhancing real-time positioning performance at no additional cost to users. This article presents the results of the first Galileo HAS testing campaign conducted at sea using a buoy-laying vessel temporarily equipped with a Galileo HAS User Terminal. The results presented in this Article include accuracy and position availability performance achieved using the Galileo HAS User Terminal. The article also highlights challenges posed by high-power radio-frequency interference, which likely originated from the Long-Range Identification and Tracking (LRIT) system antenna on board the vessel. Furthermore, the article provides additional assessments for different phases of navigation, demonstrating better performance in slow-motion scenarios, particularly relevant to mooring and pilotage applications. In these scenarios, values for horizontal accuracy reached 0.22 m 95% and 0.13 m 68% after removing interference periods. These results are in line with the expectations outlined in the Galileo HAS Service Definition Document (SDD).

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