Engineers from SpaceX, Boeing and Inmarsat spent the last few weeks preparing a Falcon 9 rocket and the Inmarsat 5 F4 communications satellite for liftoff from NASA’s Kennedy Space Center in Florida.

The rollout operation on Tuesday followed a day of evaluations using Boeing’s weight and center-of-gravity machine to determine the final measurements on the spacecraft. Launch is still targeting May 6 at 10:34 p.m. EDT (0234 UTC).

Rolling out on the eve of liftoff with the GOES-S weather satellite, a United Launch Alliance Atlas 5 rocket journeyed 1,800 feet from its vertical assembly hangar to Cape Canaveral’s Complex 41 launch pad Wednesday.