On 12 October 2012 the third and fourth satellites of the Galileo constellation will be launched aboard a Soyuz rocket from Europe's Spaceport, French Guiana.
This will mark the final step of the In Orbit Validation (IOV) phase for Galileo, the European positioning and navigation system.
The Full Operational Capability (FOC) phase of the Galileo programme will follow with the deployment of 30 satellites for a complete system, with the first Galileo services available to users in a couple of years.
While preparing Galileo, Europe already provides navigation services with EGNOS, the European Geostationnary Navigation Overlay System mainly dedicated to Air traffic Management.
This story explains the different services to be provided and supported by Galileo. It includes an interview in English, French and Spanish with Javier Benedicto, ESA Galileo Programme manager.