"Modern telecommunication networks require synchronization to about a millionth of a second per day," O'Brian said. "Power grids also ... (and) GPS systems require about 1 billionth of a second per day.
U.S. Gets New, Hyper-Accurate Atomic Clock
Anybody have the correct time? That would be a definite yes if you are asking the guys over at the National Institute of Standards and Technology.
The new atomic clock could be off by a second, give or take, over a 300
million year period or the NIST gets double their money back.