Galileo!...

Galileo! (Galileo!) Galileo! (Galileo!) Galileo fit to go. Fit to go, go, go, go, go, go, gooooo!

After a long and much-delayed 17-year gestation, Europe's answer to America's GPS system has been switched on. And it gives 10 times the accuracy.

The Galileo network will offer a free service with an accuracy of one metre, and can pinpoint locations down to a few centimetres for paying customers. The service has 18 satellites in orbit, with 30 projected by 2020 at the latest.

"Geo-localisation is at the heart of the ongoing digital revolution with new services that transform our daily lives," said Maroš Šefčovič, vice-president of the European Commission.

"Galileo will increase geo-location precision ten-fold and enable the next generation of location-based technologies; such as autonomous cars, connected devices, or smart city services. Today I call on European entrepreneurs and say: imagine what you can do with Galileo – don't wait, innovate."

Galileo's high level of accuracy comes from the four precise atomic clocks each satellite holds, which will only lose one second in three million years. When a device hears from four of the satellites, it can work out its location down to a few centimetres.

We've traced the call... he's 3 centimetres behind you!