Evolution
IOV satellites
The first two operational Galileo satellites (GSAT0101, GSAT0102) were launched from Europe's Spaceport in French Guiana in October 2011. This was followed by the launch of a second pair (GSAT0103, GSAT0104) in October 2012.
Once the In-Orbit Validation (IOV) phase is completed, all remaining satellites are placed in orbit at regular intervals to reach Full Operational Capability (FOC).
| Mass | about 700 kg |
| Size with solar wings stowed | 3.02 x 1.58 x 1.59 m |
| Size with solar wings deployed | 2.74 x 14.5 x 1.59 m |
| Design life | more than 12 years |
| Available power | 1420 W (sunlight) / 1355 W (eclipse) |
| Altitude | 23 222 km |
| Inclination | 56° |
FOC satellites
The first pair of Galileo’s FOC satellites (GSAT0201, GSAT0202) was launched in August 2014. Despite having been injected into an incorrect orbit, these were moved to an improved orbit at the end of 2014 and the beginning of 2015.
Subsequent FOC satellites were launched as follows:
- GSAT0203, GSAT0204 – March 2015
- GSAT0205, GSAT0206 – September 2015
- GSAT0208, GSAT0209 – December 2015
- GSAT0210, GSAT0211 – May 2016
- GSAT0207, GSAT0212, GSAT0213, GSAT0214 – November 2016
- GSAT0215, GSAT0216, GSAT0217, GSAT0218 – December 2017
- GSAT0219, GSAT0220, GSAT0221, GSAT0222 – July 2018
- GSAT0223, GSAT0224 – December 2021
- GSAT0225, GSAT0227 – April 2024
OS FOC satellites offer improved performance with respect to IOV satellites.
| Mass | About 733 kg |
| Size with solar wings stowed | 2.91 x 1.7 x 1.4 m |
| Size with solar wings deployed | 2.5 x 14.67 x 1.1 m |
| Design life | 12+ years |
| Available power | 1900 W |
| Altitude | 23 222 km |
| Inclination | 56° |