How many satellites will Galileo have?

Once the Galileo constellation reaches Full Operational Capability (FOC) it will consist of 24 operational satellites contributing to the achievement of the committed service performance as per OS SDD. 

The constellation may be complemented by auxiliary satellites that can be repositioned to any given slot in the same plane depending on maintenance or service evolution needs, ensuring the long term availability and, when active, contributing to the performance experienced by the user. From most locations, six to eight satellites are always visible, allowing positions and timing to be determined very accurately to. Interoperability with other GNSS increases the reliability of Galileo services.

For updated information about the constellation status click here