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2. Atomic clock - Wikipedia

   en.wikipedia.org/wiki/Atomic_clock

   Atomic clocks are installed at sites of time signal radio transmitters. [170] They are used at some long-wave and medium-wave broadcasting stations to deliver a very precise carrier frequency. [171] Atomic clocks are used in many scientific disciplines, such as for long-baseline interferometry in radio astronomy. [172]

3. NIST-F1 - Wikipedia

   en.wikipedia.org/wiki/NIST-F1

   NIST-F1. NIST-F1 is a cesium fountain clock, a type of atomic clock, in the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and serves as the United States' primary time and frequency standard. The clock took less than four years to test and build, and was developed by Steve Jefferts and Dawn Meekhof of the Time and ...

4. Chip-scale atomic clock - Wikipedia

   en.wikipedia.org/wiki/Chip-scale_atomic_clock

   A chip scale atomic clock (CSAC) is a compact, low-power atomic clock fabricated using techniques of microelectromechanical systems (MEMS) and incorporating a low-power semiconductor laser as the light source. The first CSAC physics package was demonstrated at the National Institute of Standards and Technology (NIST) in 2003, [1] based on an ...

5. Physics breakthrough brings nuclear clock closer to reality - AOL

   www.aol.com/physics-breakthrough-brings-nuclear...

   In 2023, Kocharovskaya and other researchers tested nuclei of scandium-45 atoms as possible candidates for a nuclear clock. At the time, those atoms produced the most robust energy transition ...

6. NIST-F2 - Wikipedia

   en.wikipedia.org/wiki/NIST-F2

   NIST physicists Steve Jefferts (foreground) and Tom Heavner with the NIST-F2 cesium fountain atomic clock, a civilian time standard for the United States. NIST-F2 is a caesium fountain atomic clock that, along with NIST-F1, serves as the United States ' primary time and frequency standard. [1] NIST-F2 was brought online on 3 April 2014. [1][2]

7. List of atomic clocks - Wikipedia

   en.wikipedia.org/wiki/List_of_atomic_clocks

   Department of Defense master clock. United States Naval Observatory. Washington, D.C. United States. 18 cesium atomic clocks and 4 hydrogen maser clocks. Cs, H. National Institute of Information and Communications Technology. Koganei, Japan [ 13 ] Optical lattice clock.