Time and Frequency Activities at the U.S. Naval Observatory
Author
Source
International Journal of Navigation and Observation
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-07-22
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The US Naval Observatory (USNO) has provided timing for the navy since 1830 and, in cooperation with other institutions, has also provided timing for the United States and the international community.
Its Master Clock (MC) is the source of UTC(USNO), the USNO's realization of Coordinated Universal Time (UTC), which has stayed within 5 nanoseconds RMS of UTC since 1999.
The data used to generate UTC(USNO) are based upon 73 cesium and 21 hydrogen maser frequency standards in three buildings at two sites.
The USNO disseminates time via voice, telephone modem, LORAN, Network Time Protocol (NTP), GPS, and two-way satellite time transfer (TWSTT).
This paper describes some of the changes being made to meet the future needs for precision, accuracy, and robustness.
American Psychological Association (APA)
Matsakis, Demetrios. 2008. Time and Frequency Activities at the U.S. Naval Observatory. International Journal of Navigation and Observation،Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-468140
Modern Language Association (MLA)
Matsakis, Demetrios. Time and Frequency Activities at the U.S. Naval Observatory. International Journal of Navigation and Observation No. 2008 (2008), pp.1-8.
https://search.emarefa.net/detail/BIM-468140
American Medical Association (AMA)
Matsakis, Demetrios. Time and Frequency Activities at the U.S. Naval Observatory. International Journal of Navigation and Observation. 2008. Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-468140
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-468140