Projects

DEMETRA

This project is part of the financing program of the European GNSS Agency for the research and innovation program of Horizon 2020

Main driver

provide back-up to traditional synchronization systems based on GNSS
Increase robustness of synchronization based on Galileo
S04 is meant to work in parallel with GPS/GALILEO synchronization in order to reach full technological redundancy

Market segment

• S04 addresses those networks that require outstanding timing accuracy (~100ns) and high reliability
• Major: broadcasting networks (esp. Single Frequency Network)
• Other: finance, science

Main features to address user needs

S04 allows to synchronize user terminals of a network by means of a GEO satellite and a set of two-way stations

• GNSS independence, i.e. the system realizes technological redundancy with respect to GNSS-based systems.
• Timing accuracy ~100ns.
• Reduction of interference with respect to GNSS-based systems.
• No dedicated satellites: any (commercial) geostationary satellite can be used.

Results

Best achieved performance: PPS is stably oscillating in a range narrower than +/-100nm.