RAN, the Italian Augmentation and Integrity Monitoring Network for High Accuracy High Integrity Positioning for Rail and Road Applications

Alessandro Neri, Roberto Capua, Daniele Antonetti, Fabio Frittella, Alessia Vennarini, Walter Romano, Fabrizio Mecella, Matteo Paggetti, Francesco Rispoli, Giusy Emmanuele, Vittorio Cataffo, Mauro Cardone

Abstract:	This paper describes the RAN project commissioned by ASI, the Italian Space Agency, to develop the demonstrator of the GNSS augmentation and integrity monitoring network for Rail and Road high accuracy and integrity positioning applications. The scope of this demonstrator is to validate the network on field being the fore runner of a future operational and standard system. The novelty of RAN is the exploitation of technical synergies and reciprocal advantages between the ERTMS/ETCS (European standard for Train Control and Rail Traffic Management) and CCAM (Cooperative, Connected and Automated Mobility) standards, because of cost efficiencies being the railways and roads almost close to each other's. The goal is a scalable augmentation infrastructure for an open standard multi-sensor positioning platforms embedded in road vehicles and trains. RAN is part of the ASI strategy to support the adoption of GNSS based localization systems for the deployment of the ERTMS and the Smart Roads plans. A distinctive characteristic of RAN is the provisioning of proper GNSS corrections with different Quality of Services that users can select according to the use cases. Both the GPS, Galileo and EGNOS infrastructures will be used, being part of the RAN multi-level architecture which does not require specialized receivers, as in the aviation sector, giving to users the freedom to select GNSS COTS devices compatible with the incoming RTCM SC 134 standard conceived for high integrity and accuracy applications. Furthermore, the RAN demonstrator represents the first opportunity to interface the augmentation network with the communication channel based on the new FRMCS standard.
Published in:	Proceedings of the 38th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025) September 8 - 12, 2025 Hilton Baltimore Inner Harbor Baltimore, Maryland
Pages:	192 - 202
Cite this article:	Neri, Alessandro, Capua, Roberto, Antonetti, Daniele, Frittella, Fabio, Vennarini, Alessia, Romano, Walter, Mecella, Fabrizio, Paggetti, Matteo, Rispoli, Francesco, Emmanuele, Giusy, Cataffo, Vittorio, Cardone, Mauro, "RAN, the Italian Augmentation and Integrity Monitoring Network for High Accuracy High Integrity Positioning for Rail and Road Applications," Proceedings of the 38th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025), Baltimore, Maryland, September 2025, pp. 192-202. https://doi.org/10.33012/2025.20268
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