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GADEROS Report Summary

Project ID: 11985
Funded under: FP5-GROWTH
Country: Spain

Applying global satellite navigation to safety-critical systems

Together with the Galilei study, the Gaderos project formed part of on-going research work for the Galileo programme. Gaderos, in particular, will demonstrate the use of GNSS safety-oflife features for defining a satellite-based system to perform train location for safe railway applications that will be integrated into the European Rail Traffic Management System (ERTMS) / European Train Kontrol System (ETCS). The system will offer another technological approach for train location, mainly for conventional and low-density traffic lines.

After developing the requirements base, from user needs to functional specification and test requirements, specified tools were implemented or adapted to set up the test bed. During the course of the project, tests were performed on a number of prototypes on a low-traffic line – a real railway environment on the local line between Aranjuez and Valencia in Spain.

The data from the field trials were used for an offline study and analysis of the performance, as well as input for the simulator to verify interoperability with ETCS. Gaderos first defined user requirements for low density traffic lines, including inputs from related railway projects, in order to define a common ground for this type of application. It developed then the architecture for the GNSS component in ERTMS/ETCS to reach the safety integrity level required for the location function in railway operation systems. Gaderos developed also standard test and evaluation procedures and tools for GNSS-based trials for railway safety applications. It adapted simulation tools, based on an existing International Union of Railways (UIC) simulator, to provide compatibility and interoperability of train location by satellite with the ETCS kernel. Finally, it developed a reference test site for railway safety-related GNSS applications.

The main technical achievements were:

1. the requirements specifications for the software qualification tools used in the project, as well as for the data content, structures and qualification criteria of digital route maps, including the update of software procedure specifications
2. Contribute with the technological development for GNSS locators and for safety qualifiers.
3. Requirements Specification for test, verification and evaluation procedures applicable to validations according to EU standards specification relevant to railway safety and under the frame of ERTMS/ETCS Interoperability Directive.
4. Trials and evaluation of at least one demonstrator produced by other projects, funded through EC or ESA projects.


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