Session A1: Navigation Security and Authentication

An Analysis of Authentication Availability and Enhancements Through Vector Tracking for Galileo OSNMA Data and SAS Spreading Code Authentication
Toms Dorins, Mohamed Bochkati, Dominik Dötterböck, Thomas Pany, Institute of Space Technology and Space Applications, Universität der Bundeswehr München; Stefan Baumann, Nikolas Dütsch, Industrieanlagen-betriebsgesellschaft MBH; Andreas Wenz, and Roman Ehrler, SBB Swiss Federal Railways
Location: Holiday 1 (Second Floor)
Date/Time: Wednesday, Sep. 10, 9:43 a.m.

As global navigation satellite system (GNSS) based authentication becomes vital for security-critical applications, the availability of Galileo’s (GAL) authentication services Open service navigation message authentication (OSNMA) and Signal authentication service (SAS) must be ensured even under degraded signal conditions. This study investigates the impact of Vector tracking (VT), an advanced signal processing technique, on the robustness of Galileo (GAL) authentication services. Using the Multi sensor navigation analysis tool (MuSNAT) software receiver and real-world data from a Swiss Federal Railways campaign, we assess how VT improves the availability of authenticated navigation messages and spreading code authentication compared to traditional Scalar tracking (ST).