The Role of the Consultative Committee on International Radio (CCIR) in Time and Frequency

Roger E. Beehler

Abstract:	The Consultative Committee on International Radio (CCIR) is a technical advisory group that, within the International Telecommunication Union (ITU), provides formal Recommendations, technical advice, and technical information related to the allocation and use of the radio spectrum. The CCIR does its work through a number of separate Study Groups, each of which deals primarily with one or more radio-based services recognized by the ITU. One of these, Study Group 7, is called "Science Services" and &ah with, among other things, time and frequency services and related topics. The part of CCIR is probably best known for its development and implementation of the UTC time system in 1972. The U.S. national Administration develops proposed Recommendations and provides other technical input to the CCIR through an organization of U.S. Study Groups that parallel those functioning internationally. Both the private and government sectors participate actively under the general oversight of the U.S. State Department and its US. CCIR National Committee. Current and projected future activities of U.S. and international Study Group 7 will be described, including some examples of current Recommendations, Handbooks, and other documentation that might be useful for those working with time and frequency applications.
Published in:	Proceedings of the 23th Annual Precise Time and Time Interval Systems and Applications Meeting December 3 - 5, 1991 Pasadena, California
Pages:	321 - 330
Cite this article:	Beehler, Roger E., "The Role of the Consultative Committee on International Radio (CCIR) in Time and Frequency," Proceedings of the 23th Annual Precise Time and Time Interval Systems and Applications Meeting, Pasadena, California, December 1991, pp. 321-330.
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