SpaceX is preparing to launch the U.S. military's latest Global Positioning System (GPS) satellite, GPS III SV-08, on May 30 from Cape Canaveral Space Force Station, Florida, after the mission was reassigned from United Launch Alliance's (ULA) Vulcan rocket due to ongoing delays.
The satellite, built by Lockheed Martin, will be the eighth in the advanced GPS III series and brings improved anti-jamming capabilities and more secure signals to strengthen the U.S. military's navigation and positioning network. The reassignment of SV-08 marks the second consecutive switch of a GPS mission from ULA to SpaceX's Falcon 9, as the Pentagon prioritizes rapid deployment of national security assets amid rising threats from hostile interference.
“There are today 38 GPS satellites in orbit, 31 of which operate on a daily basis,” said Col. Andrew Menschner, commander of Mission Delta 31. “But the addition of SV-08 allows the constellation to build resistance against those who would try to interfere with GPS signals.”
The GPS III satellites are designed to provide nearly eight times the anti-jamming capability of earlier versions and introduce enhanced civilian and military features, including the encrypted M-code and the L5 signal used for aviation safety. SV-08 will be the 26th satellite with M-code and the 19th transmitting L5.
Officials noted that the launch was arranged on an accelerated timeline, with Lockheed Martin receiving its task order on February 21 and SpaceX following on March 7 — less than three months before the scheduled launch. National security launches typically require 18 to 24 months of preparation.
“This allowed us to get the M-code up a little bit sooner,” said Walt Lauderdale, mission director and chief of Falcon systems at Space Systems Command. He added that SV-08 was originally scheduled for late 2025.
The GPS III program's compatibility with multiple launch vehicles has enabled this flexibility. “We benefited first and foremost from the foresight of the GPS III program to be qualified on multiple launch vehicle providers,” Menschner said. “That's a tremendous lesson learned that we're passing on.”
ULA's Vulcan remains assigned to launch the final two GPS III satellites and the debut GPS IIIF satellite. For now, no further launch reassignments have been announced.