Abstract
This paper on the verification of quantitative requirements for Global Navigation Satellite System (GNSS)-based railway applications is from the proceedings of the 12th International Conference on Computer System Design and Operation in Railways and Other Transit Systems, held in Beijing, China, in 2010. The authors report on a study undertaken to verify whether requirements for GNSS-based railway telematic applications are met through GNSS Safety of Life (SoL) services. The analysis of the achievement of railway requirements consisted of an evaluation of static measurements to verify GNSS system behavior under standard conditions of GNSS Signal-In-Space (SIS) reception; and analysis of dynamic tests focused on train position and protection level determination under variable conditions of GNSS SIS reception in a real railway environment. The authors consider the usage of GNSS SoL service in adverse SIS reception conditions and the availability of GNSS navigation modes. The analysis of the system was carried out only for non-safety related applications because the GNSS system is not able to meet the demanding requirements for railway safety-related applications.
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