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- Title
Time and Frequency Activities at the U.S. Naval Observatory.
- Authors
Matsakis, Demetrios
- Abstract
The article presents information on various clocks and frequency measurement systems at the U.S. Naval Observatory (USNO). The clock ensemble at the USNO includes cesium clocks and cavity-tuned hydrogen maser clocks, which are located in two Washington, D.C. buildings and at the USNO Alternate Master Clock (AMC) in Colorado. The Coordinated Universal Time (UTC) is generated by the Master Clock at the USNO. Several measures have been taken to ensure the accuracy and stability of the USNO's clocks. The clocks are protected by an electrical power system, and the buildings, which house the clocks, have redundant environmental controls. It is stated that the USNO serves the navigational needs of GPS and the time and frequency requirements of other users.
- Subjects
UNITED States; ELECTRONIC clocks &; watches; FREQUENCY meters; GLOBAL Positioning System; NAVIGATION equipment; TIME measurements; CHRONOMETERS; REAL-time clocks (Computers); HYDROGEN masers
- Publication
International Journal of Navigation & Observation, 2008, p1
- ISSN
1687-5990
- Publication type
Article
- DOI
10.1155/2008/387418