DARPA are funding the Robust Optical Clock Network (ROCkN) program, which aims to create optical atomic clocks with low size, weight, and power (SWaP) that yiel

DARPA are funding the Robust Optical Clock Network (ROCkN) program, which aims to create optical atomic clocks with low size, weight, and power (SWaP) that yield timing accuracy and holdover better than GPS atomic clocks and can be used outside a laboratory. Most of the big cloud providers have deployed the equivalent of the opencompute time card which sources its time from GPS sources but can maintain accurate time in cases of GPS unavailability. https://www.darpa.mil/news-events/2022-01-20 https://www.darpa.mil/news-events/2022-01-20