Fail:Usno-mc.jpg

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Usno-mc.jpg(600 × 357 piksel, saiz fail: 36 KB, jenis MIME: image/jpeg)

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Ringkasan

Keterangan
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.
Tarikh 20 Disember 2008 (original upload date)
Sumber http://tycho.usno.navy.mil/gif/clockvaults.jpg
Pengarang US Naval Observatory
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Perlesenan

Public domain
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, it is in the public domain in the United States.

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20 Disember 2008

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Tarikh/WaktuGambar kenitUkuranPenggunaKomen
semasa22:25, 20 Disember 2008Gambar kenit bagi versi pada 22:25, 20 Disember 2008600 × 357 (36 KB)Coenen{{Information |Description={{en|1=USNO Master Clock and Clock Ensemble, Washington D.C.}} |Source=http://tycho.usno.navy.mil/gif/clockvaults.jpg |Author=US Naval Observatory |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}-->

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