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  2. Department of Defense master clock - Wikipedia

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

    The Department of Defense master clock is the atomic master clock to which time and frequency measurements for the United States Department of Defense are referenced. Located in Washington D.C., the U.S. Naval Observatory master clock is designated as the "DOD Master Clock".

  3. 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]

  4. United States Naval Observatory - Wikipedia

    en.wikipedia.org/wiki/United_States_Naval...

    Atomic clock ensemble at the U.S. Naval Observatory. The U.S. Naval Observatory operates two “Master Clock” facilities, one in Washington, DC, and the other at Schriever SFB near Colorado Springs, CO. The primary facility, in Washington, D.C. maintains 57 HP/Agilent/Symmetricom 5071A-001 high performance cesium atomic clocks and 24 hydrogen ...

  5. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    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 HP 5071A cesium beam clocks. The black units in the foreground are Sigma-Tau MHM-2010 hydrogen maser standards.

  6. List of atomic clocks - Wikipedia

    en.wikipedia.org/wiki/List_of_atomic_clocks

    USNO Alternate Master Clock ... Larimer County, Colorado United States [12] Department of Defense master clock: United States Naval Observatory ... Five caesium ...

  7. Time synchronization in North America - Wikipedia

    en.wikipedia.org/wiki/Time_synchronization_in...

    COAA's Radio Clock [21] F6CTE's CLOCK [15] WWVH: 5, 10, and 15 MHz AM Voice with modified IRIG-Hformat time code on 100 Hz sub-carrier (CCIR code) HF radio and antenna (plus software if automatic updating of computer time is desired) TrueTime TL-3 WWV Receiver; CHU: 3.33 MHz, 7.85 MHz, 14.67 MHz Bell 103 modem tones, decodable by most computer ...

  8. List of components of the U.S. Department of Defense

    en.wikipedia.org/wiki/List_of_components_of_the...

    The chain of command leads from the president (as commander-in-chief) through the secretary of defense down to the newest recruits. [2] [3] The United States Armed Forces are organized through the United States Department of Defense, which oversees a complex structure of joint command and control functions with many units reporting to various commanding officers.

  9. Military time zone - Wikipedia

    en.wikipedia.org/wiki/Military_time_zone

    The military time zones are a standardized, uniform set of time zones for expressing time across different regions of the world, named after the NATO phonetic alphabet.The Zulu time zone (Z) is equivalent to Coordinated Universal Time (UTC) and is often referred to as the military time zone.