Project Galileo

Galileo is the navigation European system per satellite.

Galileo offers a global positioning system, high accuracy and with the guarantee of a civilian control.

With 6-8 Galileo satellites under visibility, and a combination with the GPS system and depending on which service is in use, the pos

The Services
Open Service (Free)
Commercial Services Public Regulated Services
Search & Rescue Services (MEOSAR System)

A constellation of 22 satellites are in usable condition, 2 satellites are “in testing” and 2 more are “not available” / orbital altitude : 23 222km (MEO)

Why the EU needs Galileo system?

  • One of the aims of Galileo is to provide an independent high-precision positioning system so European nations do not have to rely on the U.S. GPS, or the Russian GLONASS systems, which could be disabled or degraded by their operators at any time;
  • Economic and strategic benefits of having European control over the continued availability of satellite navigation services;
  • Facilitate the development of new products and services based on satellite signals with a value of € 250 billion per year by 2022;
  • Generate related technological benefits for research, development and innovation.

Added value services
Key points
The Space Segment (SS) which includes GALILEO satellites on three orbit planes (27 + 3 satellites).
The Ground Mission Segment (GMS) which generates/provides (to Space Segment) worldwide positioning/timing services. GMS controls the satellite payload e.g. navigation messages (GSS/ULS infrastructure). Thales was in charge of the design /implementation.
The Satellite Control and Constellation Management functions are for their part allocated to the Galileo Control Segment (GCS). In short terms, GCS controls the satellite orbits (TTC infrastructure). Airbus (now GMV) was in charge of the design/implementation.
GCS and GMS are both in the same Mission Center called Galileo Control Centre (GCC). There are 2 Control Centers located at Fucino (Italy) and Oberpfaffenhofen (Germany).