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PRAETORIAN SDA_511

US Military Mesh Communications (PWSA Transport Layer) · York Space Systems / US Space Development Agency

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PRAETORIAN SDA-511, one of York Space Systems' Tranche 1 Transport Layer satellites for the US Space Development Agency's Proliferated Warfighter Space Architecture — the Pentagon's answer to a fundamental problem: how do you build military space infrastructure that isn't an easy, high-value target? Rather than a handful of expensive satellites, the SDA is deploying over 150 nearly identical, mass-produced Transport Layer spacecraft in low Earth orbit, connected via optical laser inter-satellite links into a resilient global mesh network. This satellite is part of the Proliferated Warfighter Space Architecture the White House has cited as foundational to the future Golden Dome missile defense system, connecting tracking data to interceptors faster than any previous system architecture allowed.

Its orbit

Orbit
Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
Altitude
582–596 mi (937–959 km)
Inclination
81.5°
One orbit
103.9 minutes13.9 orbits a day
NORAD ID
100069
Int’l designator
2026-163L
Launched
2026

Orbital elements from CelesTrak, as of 22 Sep 2026.

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