U.S. Launches Final GPS III Satellite

The U.S. Space Force’s Space Systems Command (SSC) and Combat Forces Command (CFC) successfully launches the National Security Space Launch (NSSL) Global Positioning System (GPS) III-8 mission with the final GPS III satellite, Space Vehicle 10 (SV-10), into medium Earth orbit (MEO) on a SpaceX Falcon 9 rocket on from Space Launch Complex (SLC)-40 at Cape Canaveral Space Force Station, Florida on April 21, 2026. SSC’s System Delta 80 (SYD 80), which manages the NSSL program for Space Access, provided the critical mission assurance to safely deliver SV-10, working in closer partnership with CFC’s Mission Delta 31 (MD 31), to complete the GPS III program, marking 32 active satellites in the constellation. SV-10 provides the current constellation an additional satellite equipped with M-code technology, which provides GPS capabilities to the warfighter that are three-times more accurate and eight times more resistant to jamming than the previous constellation | Photo: SpaceX

United States Space Force has placed the final GPS III satellite, designated GPS III-8, into orbit following its launch from Cape Canaveral Space Force Station, Florida, on April 21. The mission was conducted by Space Systems Command in coordination with Combat Forces Command.

The launch forms part of the National Security Space Launch programme and completes the current GPS III constellation. The system now includes 32 operational satellites, with additional redundancy provided by spare assets already in orbit. The GPS III series is designed to support positioning, navigation and timing services for military and civilian users.

“This launch is another example of the [National Security Space Launch] program’s flexibility to carry out responsive and reliable launch for our mission partners to deliver critical capabilities on orbit, when and where it’s needed,” said U.S. Space Force Colonel Ryan Hiserote, Space Systems Command’s System Delta 80 commander and GPS III-8 mission director. “The collective efforts across the Space Force, and our close collaboration with SpaceX, allowed us to adjust the manifest in under seven weeks, a remarkable achievement compared to traditional timelines.”

The GPS III-8 mission continues a series of accelerated launches carried out since late 2024. According to officials, modular satellite design and common integration standards have enabled faster payload processing and launch preparation.

“The government acquisition strategy and industry collaboration that drove a common integration standard for GPS III satellites has proven time and again to be a strategic forethought in enhancing our launch flexibility,” Hiserote said. “The space access and [System Delta] 80 team have an unwavering commitment to deliver capabilities for the warfighter. As seen in this rapid pivot for the GPS III-8 mission, the decisions of our acquisitions experts expand the avenues we can leverage for launch and directly enhance the Space Force’s ability to maintain space superiority for the nation.”

The satellite carries M-Code technology, which is intended to provide improved signal security and resistance to interference. It also includes several demonstration payloads, such as an optical crosslink system for inter-satellite communication, a new atomic clock, a laser retroreflector array, and a 3D-printed antenna.

“Through the partnership and integration of [the] Space Force and industry teams, this launch delivers a lot for the Space Force and warfighter, bringing together an important operational capability in the GPS III [satellite] with a developmental payload that’s paving a way to the future using a novel approach,” said U.S. Space Force Colonel Stephen A. Hobbs, Combat Forces Command Mission Delta 31 commander. “The team used lead time ahead of launch to strategically integrate multiple demonstrations and leverage the ability to continue innovation of our future GPS constellations.”

“Among the various demonstrations, the testing of crosslink laser communications on a GPS satellite will be a key element, because it allows us to evaluate next-generation capabilities that can enhance the resilience and responsiveness of our space systems,” Hobbs said. “These technologies have the potential to move data faster, more securely and with greater flexibility, strengthening our ability to deliver the critical positioning, navigation and timing services for military and [civilian] uses worldwide.”

The Space Force is now focusing on follow-on GPS satellites with additional capabilities.