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  2. Atomic Clock Ensemble in Space - Wikipedia

    en.wikipedia.org/wiki/Atomic_Clock_Ensemble_in_Space

    Atomic Clock Ensemble in Space (ACES) is a project led by the European Space Agency which will place ultra-stable atomic clocks on the International Space Station. Operation in the microgravity environment of the ISS will provide a stable and accurate time base for different areas of research, including general relativity and string theory ...

  3. List of UTC timing centers - Wikipedia

    en.wikipedia.org/wiki/List_of_UTC_timing_centers

    List of UTC timing centers is a list of over 70 recognized maintainers of atomic clocks around the world from which UTC is calculated. [1] Below are links to some of the more notable time centers which contribute to the calculation of UTC.

  4. List of atomic clocks - Wikipedia

    en.wikipedia.org/wiki/List_of_atomic_clocks

    Toggle the table of contents. List of atomic clocks. ... Print/export Download as PDF; ... 18 cesium atomic clocks and 4 hydrogen maser clocks

  5. Department of Defense master clock - Wikipedia

    en.wikipedia.org/wiki/Department_of_Defense...

    The master atomic clock ensemble at the U.S. Naval Observatory in Washington D.C., which provides the time standard for the U.S. Department of Defense. [1] The rack mounted units in the background are caesium beam clocks. The black units in the foreground are hydrogen maser standards.

  6. 24 Free Holiday Word Searches

    www.aol.com/24-free-holiday-word-searches...

    Challenging your brain with printable word searches is fun all year long, but these holiday word searches are sure to get you in the spirit and help you celebrate. You can print out these free ...

  7. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    The development of atomic clocks has led to many scientific and technological advances such as precise global and regional navigation satellite systems, and applications in the Internet, which depend critically on frequency and time standards. Atomic clocks are installed at sites of time signal radio transmitters. [103]

  8. Master clock - Wikipedia

    en.wikipedia.org/wiki/Master_clock

    Master clock (at left) driving several slave clocks in an enthusiast's garage. The third one from the left at the top is a radio-controlled clock for reference. The master atomic clock ensemble at the U.S. Naval Observatory in Washington, D.C., which provides the time standard for the U.S. Department of Defense. [1]

  9. Time and frequency transfer - Wikipedia

    en.wikipedia.org/wiki/Time_and_frequency_transfer

    In a two-way time transfer system, the two peers will both transmit and receive each other's messages, thus performing two one-way time transfers to determine the difference between the remote clock and the local clock. [4]: 118 The sum of these time differences is the round-trip delay between the two nodes. It is often assumed that this delay ...