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File:Usno-amc.jpg

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English: The US Naval Observatory (USNO) Alternate Master Clock at Schriever Air Force Base, Colorado. This serves as an alternate to the master clock ensemble at USNO, Washington, D.C., to determine the time standard for the United States Department of Defense, and also contributes to the international atomic time standard UTC. It consists of an ensemble of caesium beam atomic clocks which are all compared with each other to keep them synchronized. It serves as a Stratum 0 time server for the Network Time Protocol (NTP).
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Source http://www.af.mil/shared/media/photodb/photos/060104-F-3966R-005.jpg
Author US Air Force


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This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.

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Date/TimeThumbnailDimensionsUserComment
current18:27, 3 October 2018Thumbnail for version as of 18:27, 3 October 20181,197 × 618 (224 KB)Smalljim (talk | contribs)Removed fisheye distortion and patched unimportant areas (floor and ceiling). There's an area missing on the right, but I think this is preferable to cropping so that the word "CLOCK" at top of cabinet is retained.
22:30, 20 December 2008Thumbnail for version as of 22:30, 20 December 20081,120 × 744 (861 KB)Coenen (talk | contribs){{Information |Description={{en|1=USNO Alternate Master Clock, Schriever AFB, Colo.}} |Source=http://www.af.mil/shared/media/photodb/photos/060104-F-3966R-005.jpg |Author=US Air Force |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}-->

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