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Results 41 - 44 of 44 for Atomic clocks
  • News - 10 Oct 2005
    The average user may not notice, but the Global Positioning System (GPS) is more reliable today than it was several years ago. Widely used by the military, first responders, surveyors and even...
  • News - 26 Sep 2005
    The world's best clock, NIST-F1, has been improved over the past few years and now measures time and frequency more than twice as accurately as it did in 1999 when first used as a national...
  • News - 29 Jul 2005
    Physicists at the Commerce Department's National Institute of Standards and Technology (NIST) have used the natural oscillations of two different types of charged atoms, or ions, confined together...
  • News - 19 May 2005
    The world's most accurate "ruler" made with extreme ultraviolet light has been built and demonstrated with ultrafast laser pulses by scientists at JILA, a joint institute of the National...