Watch a replay of the Delta 4 NROL-47 launch

The final flight of a discontinued version of Europe’s Ariane 5 rocket added four more spacecraft to Europe’s Galileo navigation constellation Wednesday, giving the multibillion-euro network enough satellites to remain on track for the start of full global service in 2020.

A modified sounding rocket originally designed to loft science instruments on high-altitude suborbital arcs blasted off Saturday from the Uchinoura Space Center in southern Japan and soared into orbit to become the world’s smallest satellite launcher.

Onboard video cameras captured critical events during the 50th Atlas 5 rocket launch, beaming back views in stunning clarity of staging and spacecraft separation.