Newly established satellite-based localisation systems (GNSS) promise an ever-increasing accuracy for challenging localisation tasks in transportation. Especially safety-relevant applications will become possible if localisation services are capable of determining the vehicle position in an accurate and dependable manner. Examples for safety-relevant applications in road traffic are lane selective navigation, merging of traffic flows, and so-called "Advanced Driver Assistance Systems" (ADAS). GNSS-based vehicle localisation is one of the most important preconditions for the realisation of these new features.

The approval of GNSS-based vehicle localisation systems comprises their quantitative verification by means of a reference system and suitable test scenarios. The specifications of a reference system to be applied and representative test scenarios have to be standardised in order to attain comparable test results. Currently, there is no approved and well-accepted procedure to determine the measurement quality of GNSS receivers.

Satellite-based vehicle positioning