SpaceX launched the tenth and final GPS III satellite for the U.S. Space Force on April 21, 2026, from Cape Canaveral, Florida. Named after inventor and actress Hedy Lamarr, the GPS III SV10 satellite represents the culmination of Lockheed Martin's modernized positioning constellation. The satellite will provide significantly enhanced capabilities, delivering three times greater positioning accuracy and eight times improved anti-jamming functionality compared to the preceding GPS Block IIF satellites. Once in medium Earth orbit, it will support critical navigation, timing, and positioning services for military and civilian users worldwide.

The mission flew aboard a Falcon 9 rocket, SpaceX's workhorse medium-lift vehicle, which lifted off from Cape Canaveral Space Force Station. This launch continued SpaceX's established partnership with the U.S. Space Force for national security space missions, leveraging the Falcon 9's proven reliability and cost efficiency for government constellation deployment.

The mission achieved successful completion, marking the final addition to the GPS III constellation. The naming of this satellite honors Lamarr's pioneering contributions to frequency-hopping technology, which became foundational to modern military communications and satellite operations, making it a fitting tribute as the GPS III constellation reached full operational capability.