Galileo is Europe's global navigation satellite system (GNSS), delivering highly accurate location, speed, and timing information for civilian and commercial use. The program is managed by the European Union in cooperation with the EU Agency for the Space Programme (EUSPA), which is headquartered in Prague and oversees system operations and service development.
Galileo was created to ensure European technological autonomy from foreign satellite navigation networks such as the US GPS or Russian GLONASS. The constellation consists of more than 24 satellites orbiting in Medium Earth Orbit (MEO), supported by a comprehensive network of ground stations. Today, it provides services to over 4 billion users across the globe.
How Galileo Works
The operational principle of Galileo relies on transmitting precise timing signals from satellites to receivers on Earth (such as those in smartphones or navigation devices). A receiver calculates its exact position based on the signal delay from multiple satellites. Highly accurate atomic clocks on board the satellites—among the most precise in the world—play a crucial role in maintaining synchronization.
What Galileo Is Used For
Galileo provides Positioning, Navigation, and Timing (PNT) services that are fundamental to modern society:
- transport navigation (aviation, maritime, and road transport),
- autonomous systems (such as self-driving vehicles and drones),
- logistics and cargo tracking,
- synchronization of telecommunication and energy networks,
- financial transactions requiring precise timestamping,
- crisis management and emergency services.
Main Features of the Galileo System
- Civilian control and independence – Galileo operates entirely under European Union civilian authority, guaranteeing availability even during critical situations. Unlike GPS or GLONASS, it is not primarily a military network.
- High accuracy and reliability – Galileo offers superior positioning precision compared to standard GNSS, which is essential for autonomous mobility, aviation, and precision agriculture.
- Search and Rescue service – The system is integrated into international search and rescue operations. It can detect distress signals and send a return link confirmation informing users that help is on the way.
- Resilience and security – Galileo incorporates encrypted services (such as Public Regulated Service / PRS) designed for emergency situations and critical infrastructure protection.
- Integration within the EU Space Programme – Galileo forms part of a broader EU space ecosystem alongside EGNOS (which augments signal precision) and Copernicus (focused on Earth observation and climate monitoring).
