SpaceX launches 21 military data-transport satellites after a five-day delay
SpaceX launched 21 data-transport satellites for the US military on October 10, following a five-day delay. A Falcon 9 carried the batch into orbit for the military’s proliferated satellite architecture. The mission adds spacecraft to the network’s transport layer, which carries data across the orbital system rather than serving as a commercial broadband launch.
Science··Midday
The delayed flight leaves Vandenberg
SpaceX launched 21 data-transport satellites for the US military from California on October 10, after a five-day delay. A Falcon 9 carried the group into orbit. The launch followed an attempt on October 5 that was stopped during the final minute of the countdown. SpaceX had not disclosed the cause of that abort.[1], [2]
The rocket lifted off from Vandenberg Space Force Base on October 10. The satellites belong to the Space Development Agency’s Proliferated Warfighter Space Architecture. This was the fourth of nine SpaceX launches planned for its Tranche 1 phase. The first-stage booster was flying for the sixth time and returned to Vandenberg a little over seven minutes after liftoff.[1]
Transport and tracking form distinct layers
The architecture uses optically connected satellites in low Earth orbit to support military communications, missile warning and missile tracking. Tranche 1 is planned to contain 154 operational satellites: 126 for data transport and 28 for missile tracking. Four additional satellites are planned for missile-defense tests. Their infrared sensors are intended to provide higher fidelity than those on the tracking vehicles. The agency describes a two-year cycle for developing new satellite generations.[1]
The report puts the number of transport satellites launched by this mission at 84. The newly flown batch adds to that data-carrying layer, while the programme also includes separate spacecraft for tracking missiles. These counts describe launches and planned roles within the architecture. They are not a measurement of how the complete military network performs in the field.[1]
Orbit arrival was announced after the broadcast
SpaceX ended the webcast before satellite deployment at the agency’s request. Northrop Grumman subsequently announced that the spacecraft had reached their target orbit. Successful placement therefore rests on the company’s announcement, rather than deployment footage shown during the launch broadcast. The launch report separates the rocket’s visible return from the later announcement about the satellites’ arrival. This was the year’s 111th Falcon 9 flight, with more than 70 per cent of those missions serving Starlink.[1]
