SpaceX is set to launch a new GPS satellite for the US Space Force on April 20, with a SpaceX Falcon 9 rocket topped with the GPS III SV10 satellite set to lift off from Florida. The satellite is the 10th and final in the US's advanced III line and has a three-fold increase in positional accuracy and an eight-fold improvement in jam resistance compared to prior versions. The launch will take place during a 15-minute window that opens at 2:57 a.m. EDT (0657 GMT). As part of a rocket swap, Vulcan Centaur will now launch the USSF-70 national security mission.