TU Braunschweig


Hänsel, F.; Becker, U.; Poliak, J.; Schnieder, E.:
Concepts of Certification for Usage of Satellite Based Positioning Systems in Transportation under Safety Aspects.
Proceedings of International Symposium on Operational Space Applications, Toulouse, 2006.


For safety related positioning applications, especially in transportation, the upcoming European satellite based positioning system GALILEO will provide a wide range of opportunities and challenges. With this system, for the first time the distinct requirements from the different modes of transportation can be met. For this new area of usage, new questions arise in the field of the fulfilment of specific safety requirements of each transportation mode. These questions can be answered separately for each mode by setting up requirements with respect to the existing regulations and taking into account the new specific parameters and characteristics of the new system. This leads to (mainly) four independent sets of regulations, requirements and, in consequence, to four different sorts of components to be used, i.e. one in each domain. A more sophisticated approach (partly) integrates the four domain specific sets of requirements and regulations by means of identifying a generic kernel. After that, for each mode, the mode specific characteristics can be incorporated into domain specific instantiations or extensions. This procedure requires only a single (joined) initiative to work on but offers also (on the side of the suppliers) the chance to broaden the market for safety related positioning devices or components in transportation. Suppliers would be able to take advantage of using their products for multiple transportation modes by re-using the “generic core certification” independently. For practical evaluations, a generic reference receiver can be implemented to fit these requirements. For dealing with standards, requirements and (e.g. regulative) specifications, a formal description will be helpful for gaining independence of natural (and mode specific) languages and for providing transparency and consistency. Additionally, it provides the possibility of formal checks of the described (modelled) objects. This paper shows a concept for this approach in the field of (joined) certification of positioning systems for transportation applications. To complete the concept and outline some technical details, two hardware platforms (one for road traffic and one for rail transportation) are shortly presented, which can be used for the processes for evaluation of the safety related positioning systems.