Yeah I had always thought they would be incredibly expensive. The Spanner paper (which is how I ended up at the posted link) contains this amusing line - An at

Yeah I had always thought they would be incredibly expensive. The Spanner paper (which is how I ended up at the posted link) contains this amusing line - An atomic clock is not that expensive: the cost of an Armageddon master is of the same order as that of a GPS master http://static.googleusercontent.com/media/research.google.com/en//archive/spanner-osdi2012.pdf http://static.googleusercontent.com/media/research.google.co...