Galileo moves forward

The GalileoSat development and in-orbit validation phase is well under way and the European Space Agency (ESA) has just released its procurement process to Industry indicating that the first completely civil satellite navigation system is moving forward.

Galileo Implementation: a phased approach

The Galileo Programme is being implemented in three phases:

• Definition phase
• Development and in-orbit validation
• Full Deployment and Operations

The Definition phase was completed in 2003 resulting in the basic specifications for the system.

The Development and In-Orbit Validation phase was initiated in late 2003. This phase aims to perform an in-orbit validation of the system using a reduced constellation of four satellites which is the minimum number to guarantee the provision of exact positioning and time at test locations.

Early in this phase, an experimental satellite will also be launched, to secure the Galileo frequency filings, to characterize the orbits to be used by the in-orbit validation satellites and to test some of the critical technologies, such as the atomic clocks.