SpaceX successfully executed the launch of the GPS III Space Vehicle 08 (GPS III-SV08) on Monday, April 20, 2026, from Cape Canaveral Space Force Station. The mission, which utilized a Falcon 9 rocket, marks the final deployment in the United States Space Force’s GPS III constellation. The satellite, nicknamed Earhart in honor of aviation pioneer Amelia Earhart, was deployed into a medium Earth orbit approximately 12,550 miles above the planet following a liftoff from Space Launch Complex 40.
The GPS III-8 satellite is the tenth and final unit in the current generation of Global Positioning System satellites manufactured by Lockheed Martin. These satellites are designed to provide significant upgrades over the aging GPS IIF fleet. Key technical improvements include a three-fold increase in accuracy and an eight-fold enhancement in anti-jamming capabilities. The GPS III series also features a modular design that allows for the integration of new technologies as they become available. For civilian users, the satellite broadcasts the L1C signal, which is compatible with other international systems such as Europe’s Galileo.
The launch was conducted under the National Security Space Launch (NSSL) program, managed by the Space Systems Command (SSC). SpaceX secured the contract for this specific mission as part of a multi-launch agreement with the Department of Defense. Following the successful separation of the first stage, the Falcon 9 booster performed a controlled descent to land on a SpaceX droneship stationed in the Atlantic Ocean. This reuse of flight-proven hardware has been a central component of the Space Force's strategy to reduce costs and increase the tempo of national security missions.
Colonel Douglas Pentecost, Deputy Program Executive Officer for Assured Access to Space, emphasized that the completion of the GPS III constellation is a critical milestone for the Department of the Air Force. The GPS system supports over four billion users globally and is vital for precision munitions, navigation, and timing synchronization for financial networks and power grids. The GPS III-8 satellite has a design life of 15 years, ensuring long-term stability for the constellation as the Space Force prepares for the next generation of hardware.
With the GPS III production line now concluding, Lockheed Martin and the Space Force are shifting focus to the GPS IIIF (Follow-on) program. The IIIF satellites will introduce further enhancements, including a regional military protection capability and a laser retroreflector array for improved orbital tracking. The first GPS IIIF satellite is currently scheduled for launch in 2027. Today’s mission solidifies SpaceX’s role as a primary provider for heavy-lift national security payloads, concluding a series of launches that began with the first GPS III satellite in December 2018.