Three satellite constellations built to feed the same missile defense architecture cannot currently pass data to one another. Breaking Defense reported that the Space Force is weighing a set of translator spacecraft to bridge the gap, at a cost that sources say could approach $1B across the wider fix.
The problem sits in the optical terminals. SpaceX's Space Data Network Backbone uses proprietary laser terminals the company calls Plasers. The Space Development Agency's Tracking Layer and Space Systems Command's medium Earth orbit missile warning satellites each carry their own designs, and those two are incompatible with each other as well. A single SDA official confirmed the mismatch on the record.
Why standards slipped apart
The split traces to a 2025 decision to shift the network's backbone away from SDA's Transport Layer to SpaceX's constellation. By then SDA had already built its transport and tracking satellites around an open optical standard first published in 2022.
Translator satellites as a workaround
The proposed fix is a constellation of 12 to 13 Space Exchange Points, each expected to cost $12M to $14M. Those satellites would carry multiple terminal types plus translation software, acting as switches between waveforms.
A longer-term option is version 4.0.0 of SDA's optical standard, developed with SSC, which adds a mode for low to medium orbit links. An SDA official said it is not yet on contract for any tranche but is under consideration for Tranche 4.
Space Systems Command confirmed that prototype Enterprise Space Terminals are being designed to equip the translator satellites, while declining to discuss Plaser compatibility or the program's total size and schedule. Several sources said the incompatibility was avoidable had the Pentagon standardized earlier.
