A SpaceX Falcon 9 rocket stands on pad 40 at Cape Canaveral Space Force Station in Florida before liftoff with the GPS 3 SV06 spacecraft. Credit: SpaceX
SpaceX’s second launch for the U.S. military in three days is set to blast off from Florida and deliver a GPS navigation satellite into orbit Wednesday, reinforcing the global positioning and timing network as four more GPS spacecraft are in storage at a Lockheed Martin factory in Colorado to be launched as needed over the next few years.