Of course, while we know the United States Navy to be impressive and formidable, ... Known as the US Naval Observatory Master Clock, ...

"That allows us to get a good measure of whether those clocks are changing - we can then apply an adjustment if necessary," said Dr Whibberley. The master clocks at NPL are in turn kept in check by ...

A broad-band completely reciprocal transmission path across the Atlantic was made available for the first time by the Telstar I satellite. In August, 1962, the U. S. Naval Observatory (USNO) and the ...