The first two Galileo In-Orbit Validation satellites were launched by Soyuz ST-B flown from Centre Spatial Guyanais on 21 October 2011, and the remaining two on 12 October 2012. As of 2017, the satellites are fully useful for precise positioning and geodesy with a limited usability in navigation.
The first two Galileo In-Orbit Validation satellites were launched by Soyuz ST-B flown from Centre Spatial Guyanais on 21 October 2011, and the remaining two on 12 October 2012. As of 2017, the satellites are fully useful for precise positioning and geodesy with a limited usability in navigation.