Safety concept of railway signalling based on Galileo Safety-of-Life Service

Abstract

The Safety-of-Life (SoL) Service -Level A of the satellite navigation system Galileo has great application potential for both aviation and railway safetyrelated systems with view to reduce operational, investment and maintenance cost. In aviation sector, radio navigation has been widely used for safety applications for several decades. That's why main quality requirements regarding the Galileo Signal-In-Space (SIS) SoL service -Level A, such as accuracy, integrity, continuity and availability, were taken from aviation ground radio navigation systems. However, different safety philosophies used in aviation domain and in railway signalling complicate direct employment of the Galileo quality measures to railway safety applications.