The European Global Navigation Satellite Systems Agency (GSA), or European GNSS Agency, has been responsible for the operations and service provision for both EGNOS and Galileo, the European satellite positioning and navigation programmes. 

The European Global Navigation Satellite Systems (GNSS) serves as the essential link between space technology and user needs by translating Galileo and EGNOS signals into valuable, reliable services for European citizens.  

After the adoption of the new Space Programme Regulation in 2021, GSA has been transformed into the EUSPA (European Union Space Programme Agency), taking over also responsibilities for Copernicus markets uptake.