SpaceX test-fired a Falcon Heavy rocket Wednesday night at the Kennedy Space Center in preparation for launch June 24 with a stack of weather observation and technology demonstration satellites.

Launching new Global Positioning System navigation satellites at a rate not seen in 21 years, this year’s fourth such deployment is coming up at midday Wednesday, Oct. 29 by an Atlas 5 rocket from Cape Canaveral.

Members of NASA’s independent panel of aerospace safety advisors raised concerns last week about quality control problems that “seemingly have plagued” Boeing’s Starliner crew capsule program, while urging NASA to closely monitor SpaceX’s plans to reuse Crew Dragon spaceships on astronaut flights to the International Space Station.