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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. 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 ...

  4. List of UTC timing centers - Wikipedia

    en.wikipedia.org/wiki/List_of_UTC_timing_centers

    [5] When available, links are provided to the relevant "Time Page" displaying the current time as shown from the given service. Apparent times may vary due to variations in internet transmission times from various locations. Canada: National Research Council; France: Systemes de Reference Temps Espace, Time Page; Netherlands: VSL, Time page

  5. 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

  6. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    Some manufacturers may label radio clocks as atomic clocks, [141] because the radio signals they receive originate from atomic clocks. Normal low-cost consumer-grade receivers that rely on the amplitude-modulated time signals have a practical accuracy uncertainty of ± 0.1 second.

  7. 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.