Usno-mc

Autor:

US Naval Observatory

Credit:

http://tycho.usno.navy.mil/gif/clockvaults.jpg

Krótki link:

https://www.plwiki.pl/b/579b7

źródło:

Wikimedia Commons

Wymiary:

600 x 357 Pixel (36691 Bytes)

Opis:

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.

Licencja:

Public domain

Komentarz do licencji:

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