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US Naval Observatory outside display of the master clock time. The U.S. Naval Observatory provides public time service via 26 NTP [33] servers on the public Internet, [36] and via telephone voice announcements: [37] +1 202 762-1401 (Washington, DC) +1 202 762-1069 (Washington, DC) +1 719 567-6742 (Colorado Springs, CO)
In the United States, the United States Naval Observatory provides the standard of time, called UTC(USNO), for the United States military and the Global Positioning System, [1] while the National Institute of Standards and Technology provides the standard of time for civil purposes in the United States, called UTC(NIST).
The other standard time and frequency reference for the U.S. Government is the National Institute of Standards and Technology (NIST) master clock. The U.S. Naval Observatory also maintains an alternate clock designated "USNO Alternate Master Clock" at Schriever Space Force Base, Colorado. [2]
On that November day, the US Naval Observatory telegraphed a signal that coordinated noon at Eastern standard time with 11 am Central, 10 am Mountain, and 9 am Pacific standard time. A March 1905 issue of The Technical World describes the role of the United States Naval Observatory as a source of time signals:
“That’s the crux of our resolution: to work together to establish this standard time,” U.S. Naval Observatory’s Susan Stewart said this week at the group's conference in Cape Town, South ...
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]
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 White House on Tuesday directed NASA to establish a unified standard of time for the moon and other celestial bodies, as the United States aims to set international norms in space amid a ...