Watch the astronauts give a tour of their new Crew Dragon spacecraft

Trouble with a piece of ground equipment used for testing of the 10 Iridium communications satellites aboard the next Falcon 9 rocket launch has forced a 24-hour delay in the mission to Friday, officials said Tuesday.

A United Launch Alliance Atlas 5 rocket fired into the night sky over Cape Canaveral just after midnight Wednesday, carrying the U.S. Air Force’s fourth AEHF communications satellite designed to enable secure voice, video and data links between U.S. and allied forces.

Giulio Ranzo is the chief executive of Avio, the Italian company responsible for building the Vega rocket. Ranzo recently spoke with Spaceflight Now about the Vega rocket’s increasing launch rate, the debut of the new Vega C booster in 2020, and future plans to evolve the Vega design to compete with commercial microsatellite launchers.