OSNMA User Performance Assessment at ESA/ESTEC – System Qualifications Tools and Methodologies

This article will provide an extensive collection of results from the OSNMA testing activities conducted at ESA/ESTEC including relevant setup, processing tools, data collection and testing methodologies to assess relevant KPIs such as position accuracy and availability, OSNMA data availability on a global scale, Time To First authenticated data and fix. OSNMA testing activities at ESA/ESTEC cover the monitoring of failed authentications, the global OSNMA performance as monitored by the Galileo Experimental Sensor Stations (GESS), and the assessment of local user performance in rural and urban environments. Concerning the tools, the main OSNMA system qualification tool used by the ESA is the FOC Test User Receiver, implementing real time OSNMA processing including: • parallel PVT engine with and without OSNMA, • wide grade of user configurability to emulate different receiver operational use cases, • optimized OSNMA data extraction and processing logic to maximize performance in challenging environments, • automated testing capabilities to characterize Time To First Fix (TTFF) and TTTF-Authenticated Data (TTFF-AD) for different receiver start-up assumptions. Beyond, additional receiver technology implementing OSNMA were involved in the characterization of the OSNMA performance in mobile rural and urban environments.