Two Cold-Atom Clocks Hold a Radar Network Together Without Satellites

In a June 2026 UK trial, two prototype cold-atom clocks kept two networked Saab Giraffe 1X radars fused into one coherent air picture with no satellite timing at all, degrading predictably under disruption and recovering fast. It is the first known demonstration of network time synchronization holding a military radar network together in GNSS-denied conditions.