NASA to test-fly Deep Space Atomic Clock to aid future autonomous space-based navigation. Weighing in at 3.5kg it definitely looks the part, but I wonder if this could have been miniaturised further - to fit nanosat requirements for example - as the shape is definitely non-standard. And maybe compatibility with Arduino as well would be nice? Hmm, so much stuff to check… maybe some rubidium clocks out there that could do the trick?