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GPS III-8: SpaceX Launches Advanced GPS Satellite For The Space Force
April 21, 2026
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A SpaceX Falcon 9 launched the GPS III SV10 (Space Vehiche 10 also known as GPS III-8) satellite for the U.S. Space Force from Space Launch Complex 40(SLC-40) at Cape Canaveral Space Force Station on Tuesday (April 21) at 0653 UTC marking the delivery of the final satellite in the GPS III production block and completing the service's most resilient constellation to date.

The Falcon 9 Block 5's first-stage booster B1095, came back to Earth about 8.5 minutes after launch as planned on Tuesday, touching down softly in the Atlantic Ocean on the SpaceX droneship "Just Read the Instructions."

This was the seventh launch and landing for this particular booster, according to a SpaceX mission description. And it was the final Falcon landing for "Just Read the Instructions," SpaceX said during Tuesday's launch commentary; the droneship will now pivot to supporting liftoffs of SpaceX's Starship megarocket.

"After 156 successful Falcon 9 landings, Just Read the Instructions will be fully dedicated to support Starship operations going forward," SpaceX wrote on X.

The Falcon 9's upper stage, meanwhile, continued powering its way to medium-Earth orbit, deploying GPS III SV10 about 90 minutes after liftoff. Following separation, the satellite will use its own liquid apogee engines to raise its orbit to the operational medium Earth orbit at approximately 20,200 kilometers altitude, a process taking roughly 10 days.

With the addition of SV10, the active GPS constellation now includes 32 satellites, providing increased redundancy and resiliency. Mission Delta 31 of the Space Force will oversee on-orbit checkout and eventual integration into the live navigation network.

SV10 is the tenth and last spacecraft under the original GPS III production contract awarded to Lockheed Martin in 2008. The satellite, nicknamed "Hedy Lamarr" after the actress and inventor who co-patented frequency-hopping technology, was built in Colorado and declared available for launch in December 2022.

The new satellite enhances the constellation with M-code technology, providing three times greater positional accuracy and eight times improved jam resistance compared to previous generations. This upgrade significantly boosts the effectiveness and lethality of U.S. military weapon systems while improving civilian navigation.

"GPS III satellites have a three-fold increase in positional accuracy and an eight-fold improvement in jam resistance compared to prior versions," Space Force officials said in a statement on Jan. 28, just after GPS III SV09 rode a Falcon 9 to orbit.

"These advanced features enable the constellation to provide an across-the-board boost in effectiveness and lethality to weapon systems in every theater," they added.

SV10 carries several developmental payloads to test future GPS capabilities, including:

  • Crosslink Demonstration Payload: Tests optical crosslink communications to improve ground segment resilience and enable faster satellite tasking.

  • Digital Rubidium Atomic Frequency Standard (DRAFS): A new space-qualified atomic clock to enhance long-term timing precision for future GPS IIIF missions.

  • Laser Retroreflector Array (LRA)**: The second use of an LRA to support NASA's scientific research and improve Earth center determination.

  • 3D-Printed Omni Antenna: The first use of this advanced manufacturing component, which reduces production time and costs by nearly 60 percent.

GPS III-8 mission demonstrated the National Security Space Launch (NSSL) program's flexibility, as SpaceX was selected as the launch provider with less than seven weeks notice following a change in launch service provider. This rapid turnaround built upon accelerated timelines established by previous GPS III launches in 2024, 2025, and early 2026.

GPS III SV10 was originally supposed to fly aboard United Launch Alliance's new Vulcan Centaur rocket. Last month, however, the Space Force announced that it was switching the satellite to a Falcon 9 due to issues that Vulcan has experienced with its solid rocket boosters (SRBs).

As part of this rocket swap, Vulcan Centaur will now launch the USSF-70 national security mission, which had been slated to fly on a SpaceX Falcon Heavy. USSF-70 is expected to launch no earlier than summer 2028, Space Force officials have said. (Presumably, Vulcan Centaur's SRB issues will be worked out by then.)

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Artemis III Crew Announced By NASA

NASA Administrator Jared Isaacman announced Monday, the four-person crew for the Artemis III mission at an event in Johnson Space Center in Houston, Texas. The crew, expected to launch in 2027, consists of Commander Randy Bresnik, Pilot Luca Parmitano (European Space Agency), and Mission Specialists Frank Rubio and Andre Douglas, with Bob Hines named as backup.

Isaacman described the mission as the beginning of a new era, likening it to the start of Earth’s first "Starfleet" and emphasizing that the mission is designed to take calculated risks to ensure future lunar safety.

"You carry the fire of exploration from generations past, the confidence of this agency, and the support of this nation, and the dreams of millions who will be cheering you on, knowing that what others believe to be impossible happens to be what we do best here at NASA," Isaacman said during the proceedings.

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Artemis 3 will be a significant stepping stone toward that endeavor, but won't fly beyond low Earth orbit (LEO). If all goes according to plan the four newly assigned astronauts of Artemis 3 will rendezvous and dock the Orion spacecraft with Starship HLS or Mark 2, and lay the groundwork for future Artemis missions to the moon. Ultimately, the mission will allow NASA to test out much of the most cutting-edge hardware in the American spaceflight portfolio.

"Artemis 3 will be an extraordinary demonstration of what is possible when the greatest aerospace companies across the United States, alongside our European partners come together to showcase the technological might and ambition of the free world," Isaacman said during the event. "This seems like the beginning of the future that we imagined as children. This seems like the very beginning of Earth's first Starfleet to me"

Artemis 3's Orion crew capsule will launch on NASA's Space Launch System (SLS) rocket into LEO, where it will rendezvous with the Blue Origin's Blue Moon lander (which will launch on one of the company's New Glenn rockets) and SpaceX's Starship.

NASA’s Artemis program manager Jeremy Parsons highlighted the complexity of coordinating multiple launch pads and vehicles. However, Blue Origin executives expressed confidence in their timeline despite a recent New Glenn rocket explosion that damaged their launch pad. SpaceX continues to test its Starship vehicle.

"Artemis 3 is an incredibly exciting, complicated, and highly coordinated multi-launch campaign. It's going to happen in a short period of time with three of the world's most powerful rockets," Parsons said during Tuesday's event.

The goal will be to practice docking maneuvers and operations between the vehicles. Both SpaceX and Blue Origin were awarded contracts through NASA's Human Landing System (HLS) program, but each has faced developmental delays that have prompted NASA's willingness to fly Artemis 3 with either or both landers, depending on their availability.

Bresnik, a retired Marine colonel and Space Shuttle veteran, has previously served as ISS commander and will lead the mission.

Parmitano an Italian astronaut and ESA pilot, is a veteran of two ISS expeditions and previously survived a life-threatening water leak incident during a spacewalk.

Rubio, a physician and Army veteran, he holds the record for the longest single spaceflight by an American astronaut at 371 days.

Douglas, a test engineer and Coast Guard commander, this will be his first spaceflight after serving as backup for Artemis II.

Hines, selected as a backup astronaut for Artemis 3, joined NASA's 2017 astronaut class after serving 23 years in the United State Air Force as a fighter pilot and instructor. Hines previously flew to space aboard the SpaceX Crew-4 mission to the International Space Station in 2022 where he logged 170 days in space.

During Tuesday's ceremony, the three NASA astronauts of the Artemis 2 crew including commander Reid Wiseman passed the (literal) Artemis baton to the new crew.

"I know all of us are very touched by the thoughtful symbolism of the passing of the baton, but I think now, after your mission, you're passing us something far greater," Bresnik said. "The world watched your mission, and over the course of those 10 days, we saw how you inspired people worldwide. You saw how something was ignited within people. It was ignited within all of us by watching your mission."

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Belfast Stabbing Suspect Charged With Attempted Murder, As Anti-immigration Erupt

A 30-year-old Sudanese national was charged with attempted murder, possession of a bladed article, and threats to kill following a brutal knife attack on Kinnaird Avenue, North Belfast, on Monday. The suspect, who claimed asylum upon arriving by bus from Dublin on February 10, 2023, was granted leave to remain in the UK in September 2023 until 2028.

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