File:Usno-mc.jpg
Usno-mc.jpg (600 × 357 pixels, file size: 36 KB, MIME type: image/jpeg)
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Summary
| Description |
English: US Naval Observatory's (USNO) Master Clock Ensemble, Washington D.C., made up of a large number of Symmetricom 5071A cesium beam clocks (rack in background). This provides the time standard for the US military. The large black object in the foreground is a Symmetricom (formerly Sigma-Tau) MHM-2010 active hydrogen maser.
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| Date | 20 December 2008 (original upload date) |
| Source | http://tycho.usno.navy.mil/gif/clockvaults.jpg |
| Author | US Naval Observatory |
| Permission ( Reusing this file) |
Per source's Security & Privacy Policy: "All information on this site is public domain and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested." |
Licensing
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. |
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