Inside GNSS Media & Research

SEP-OCT 2018

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42 Inside GNSS S E P T E M B E R / O C T O B E R 2 0 1 8 www.insidegnss.com D espite the not fully deployed constellation and ground infra- structure, a reliable service pro- vision and compliance to the declared performance targets have since become a priority. This represents a challenge for all European GNSS stakeholders, including the European Commission, European GNSS Agency (GSA), and European Space Agency (ESA), who now have to commit to a service from a sys- tem still under deployment with further upgrades ongoing, ensuring both incre- mental system verification and sustained service provision. Nevertheless, it was fundamental to assert Galileo's pres- ence in the exploding market of mobile devices and location-based services, including dual frequency chips recently embedded in smartphones, where the Galileo E1/E5 signals are already play- ing a major role. The majority of the last generation smartphones are now Galileo-enabled (see www.usegalileo. eu, Additional Resources), making the Galileo engineering efforts started more than a decade ago a reality in the hands of oen-unaware users. With this article we want to show that Galileo is definitely present and it works. Galileo System Status Let's start with a brief summary of the system configuration enabling the Ini- tial Services provision. e latest satel- lites launches in 2016-2018 (L8, L9, and L10) in the quadruple configuration with Ariane 5 have significantly boosted the deployment of the Galileo Space Seg- ment. The numbers speak for them- selves: 26 satellites built and launched in a 7-year time frame. As of August 2018, 17 satellites are currently usable with the Signal In Space flagged as healthy. e latest constellation information can be retrieved from the European GNSS Service Centre website (see Additional Resources). Measuring Galileo Performance Navigation and Timing Performance Figures of Merit | Part 2 GAETANO GALLUZZO STEFANO BINDA DANIEL BLONSKI FRANCISCO GONZALEZ ENRICO SPINELLI RICHARD SWINDEN RAFAEL LUCAS RODRIGUEZ MARCO FALCONE ESA - ESTEC ESA FIGURE 1 Galileo satellites atop Ariane 5 This article provides an overview of the current Galileo system deployment status and performance trends since the Initial Open Service declaration on December 15, 2016. The system performance is assessed through a set of navigation and timing performance figures of merit. The outstanding performance results along with the acceleration in the constellation and ground segment deployment confirm that the Galileo system is on track towards Full Operational Capability. That Initial Open Service Declaration in late 2016 marked a historical milestone in the Galileo program. Here the authors will illustrate that Galileo has arrived and that it works.

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