A 'telemetry, tracking and command' antenna, 13 m in diameter, for controlling Galileo satellites at the Galileo ground station near Nouméa, New Caledonia. The antenna is due to begin operations later in 2013. Part of a growing worldwide network, the ground station incorporates a Galileo Sensor Station that monitors the quality of navigation signals and an Uplink Station to relay navigation corrections to the satellites for rebroadcast to users.