Space Development Agency
Every Cosmic Herald story on Space Development Agency — missions, launches, discoveries, and the business of space, newest first.
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Military Space
Half the Constellation: SDA Resumes Tranche 1 Satellite Launches After Nine-Month Pause
SDA launched 21 more York-built data-relay satellites after a nine-month pause to fix on-orbit software and hardware issues, bringing half of its 126-satellite Tranche 1 Transport Layer into orbit even as GAO warns the program may not deliver capability on schedule.
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Military Space
Pentagon's Missile-Tracking Constellation Grows by 36 as SDA Hands Out $1.75 Billion
L3Harris and Sierra Space will build 36 new missile-tracking satellites for $1.75 billion, pushing the Space Development Agency's Tranche 3 constellation to 104 spacecraft in support of the Golden Dome missile-defense architecture.
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Military Space
SDA Hands L3Harris and Sierra Space $1.75 Billion to Build 36 Golden Dome Tracking Satellites
The Space Development Agency awarded L3Harris and Sierra Space a combined $1.75 billion on July 13 to build 36 missile-tracking satellites for Golden Dome's Tranche 3, targeting launch by the end of 2028.
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Military Space
Tactical Radio From Orbit: York's 'Dragoon' Proves LEO Can Do GEO's Job
York Space Systems' Dragoon satellite ran five successful two-way UHF tactical-comms demos from low Earth orbit, and coverage indicates the SDA is trimming its satellite buy — reportedly canceling 11 — on the strength of the result.
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Military Space
One Outage Stopped Navy Drone Tests. The Pentagon's SpaceX Problem Is Bigger Than That.
When a Starlink outage last August left Navy unmanned surface vessels bobbing uselessly off the California coast, it crystallized a strategic anxiety the Pentagon had been managing quietly: the U.S. military is profoundly dependent on a commercial satellite network it does not own or control.
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Military Space
The SDA's Transport Layer: America's Proliferated Military Satellite Constellation
The Space Development Agency is building a mesh network of hundreds of small military satellites in low Earth orbit — a fundamentally different approach to space-based command and control than anything the US has operated before.
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Military Space
The Space Force is quietly replacing its aging satellite backbone. Here's what's new.
GPS III, Next Gen OPIR missile warning satellites, and the Evolved Strategic SATCOM program are replacing Cold War-era systems that have been showing their age. The upgrades are designed to survive a contested space environment that didn't exist when the original satellites were built.
