SpaceX launches final GPS III satellite for the U.S. Space Force

SpaceX launched the final GPS III satellite for the U.S. Space Force from Cape Canaveral Space Force Station on April 21, 2026.

The mission, GPS III SV10, lifted off aboard a Falcon 9 after the U.S. Space Force moved the launch from United Launch Alliance’s Vulcan rocket to SpaceX in March. The Space Force said the change was made to protect the delivery timeline for GPS capability while Vulcan booster anomaly investigations continued.

The satellite is the 10th and final spacecraft in the GPS III line. According to the Space Force and launch coverage, it carries technology demonstrations that will inform future GPS IIIF work, including an optical cross-link demonstration and a new digital atomic clock.

Space Force officials had said the launch would come no earlier than late April, but the mission came off the pad on April 21 after the provider swap accelerated it onto Falcon 9.

Why it matters

GPS III is the latest generation of U.S. navigation satellites, and the final launch closes out that block while setting up the next phase of the program. The flight also underscores how the Space Force is managing launch scheduling around vehicle availability and reliability issues.

What happens next

The next step is on-orbit deployment and checkout of the satellite. Official post-launch confirmation will determine when the Space Force can declare the spacecraft fully operational.