TU Braunschweig

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QualiSaR

Development of a Qualification Procedure for the Usage of Galileo Satellite Receivers for Safety Relevant Applications

Projektbearbeiter: Dirk Spiegel, M.Sc., Felix Reinbold
Auftraggeber: European Commision
Projektpartner: Technical University of Denmark - Division of Geodesy,
abatec Group AG - immotiotec,
Deutsches Zentrum für Luft- und Raumfahrt (DLR),
IFSTTAR
Projektwebsite: http://www.qualisar.eu

Please visit www.QualiSaR.eu for detailed information.

Motivation

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.

Objectives

QualiSaR aims at the development of a qualification procedure for receivers of satellite-based localisation systems. The basis for an internationally accepted qualification procedure is a harmonised and consistent terminology in line with existing metrological standards. The terminology is to be used for specifying representative test scenarios and requirements for a reference system. The reference system has to be able to provide a satellite-independent vehicle position under varying conditions. Summing up, the main objective of a standardised qualification procedure for Galileo capable receivers can be divided into three subordinated objectives:

  • Unified term structure describing the quality properties of satellite-based localisation
  • Representative test scenarios and a reference system for the quantitative assessment of GNSS receivers
  • Proposal for a standardised qualification procedure.

Approach

The basic idea for obtaining an unambiguous terminology is not only to identify and define the relevant terms but also to ascertain the relations between each other. The resulting term structure will be made accessible to the public by a web-based terminology management system. Based on this terminology, specifications for test scenarios can be designed. For this purpose, a software simulator needs to be developed for estimating the behaviour of the GNSS measurement quality under several operating and environmental conditions. For performing these test scenarios under real-life conditions, a reference system has to be developed that is independent from the satellite-based localisation system. An evaluation of the reference system's measurement quality in line with inter-national standards is required. The traceability will be achieved by using a measurement standard for the calibration of the reference system. Finally, the qualification procedure will lead to a standardisation proposal as a suggestion for technical committees and standardisation authorities like CEN, IEC and ISO.


http://www.iva.ing.tu-bs.de?iT=4_519&projectId=445