Space Force Delivers Final GPS III Satellite to Orbit

On April 21, 2026, the U.S. Space Force launched the final GPS III satellite into orbit from Cape Canaveral Space Force Station, Florida.

The launch of the final GPS III satellite marked a major milestone for the Space Force, completing the most accurate and resilient GPS constellation ever deployed. Designed by Lockheed Martin and launched by SpaceX, GPS III satellites deliver three times greater accuracy, eight times stronger resistance to jamming, and secure M-Code signals critical for military operations in contested environments.

The final GPS III satellite, “Space Launch Vehicle 10 (SV 10),” also includes a special demonstration payload that includes the following:

• Crosslink demonstration payload, which will test optical crosslink capabilities to improve ground segment resiliency and enable faster tasking of GPS satellites.

• A new space-qualified atomic clock, which will enhance long-term timing and precision for future GPS III follow-on missions. The qualification of this new atomic clock will expand its sourcing capabilities for future spacecraft in the GPS constellation.

• The second use of a laser retroreflector array, which enables NASA to conduct scientific research by delivering precise range measurements and improving long-term determination of Earth's center. These arrays also support continued improvement to GPS III system performance.

• The first use of a 3D-printed omnidirectional antenna, which demonstrates advanced manufacturing techniques that reduce production time and cost by nearly 60 percent. The antenna is an important component of the telemetry, tracking, and command subsystem and is used to communicate with ground systems.

Watch the video to learn more about the final GPS III satellite’s successful launch into orbit.