The U.S. Space Force awarded SpaceXAI a $2.29 billion fixed-price Other Transaction Authority (OTA) contract to develop the Space Data Network (SDN) Backbone, a proliferated low Earth orbit (pLEO) satellite constellation designed for secure, high-speed military communications.
The agreement covers the SDN Backbone, a resilient network architecture providing high-capacity, low-latency data transport for connecting military sensors and weapons platforms globally. SpaceXAI must deliver a fully operational prototype capability by the end of 2027.
The system utilizes an expanded optically interconnected mesh of satellites to deliver worldwide low latency tactical communications and broadband services, functioning alongside the Space Development Agency’s (SDA) Transport Layer to form a unified Department of Defense data transport architecture.
The network is foundational to the Golden Dome missile defense initiative, providing the communications pathways to move data from missile warning sensors to interceptors in near real time.
While SpaceX is currently the sole provider for the backbone (formerly known as MILNET), the Space Force plans to identify additional contractors for satellite construction and other network elements to galvanize the U.S. industrial base.