Book contents
- Time: From Earth Rotation to Atomic Physics
- Time: From Earth Rotation to Atomic Physics
- Copyright page
- Dedication
- Contents
- Preface
- 1 Time Before the 20th Century
- 2 Time from the Earth’s Rotation
- 3 Ephemerides
- 4 Variable Earth Rotation
- 5 Earth Orientation
- 6 Ephemeris Time
- 7 Relativity and Time
- 8 Time and Cosmology
- 9 Dynamical and Coordinate Timescales
- 10 Clock Developments
- 11 Microwave Atomic Clocks
- 12 Optical Atomic Standards
- 13 Definition and Role of a Second
- 14 International Atomic Time (TAI)
- 15 Coordinated Universal Time (UTC)
- 16 Time in the Solar System
- 17 Time and Frequency Transfer
- 18 Modern Earth Orientation
- 19 International Activities
- 20 Time Applications
- 21 Future of Timekeeping
- Acronyms
- Glossary
- Index
- References
19 - International Activities
Published online by Cambridge University Press: 01 October 2018
Book contents
- Time: From Earth Rotation to Atomic Physics
- Time: From Earth Rotation to Atomic Physics
- Copyright page
- Dedication
- Contents
- Preface
- 1 Time Before the 20th Century
- 2 Time from the Earth’s Rotation
- 3 Ephemerides
- 4 Variable Earth Rotation
- 5 Earth Orientation
- 6 Ephemeris Time
- 7 Relativity and Time
- 8 Time and Cosmology
- 9 Dynamical and Coordinate Timescales
- 10 Clock Developments
- 11 Microwave Atomic Clocks
- 12 Optical Atomic Standards
- 13 Definition and Role of a Second
- 14 International Atomic Time (TAI)
- 15 Coordinated Universal Time (UTC)
- 16 Time in the Solar System
- 17 Time and Frequency Transfer
- 18 Modern Earth Orientation
- 19 International Activities
- 20 Time Applications
- 21 Future of Timekeeping
- Acronyms
- Glossary
- Index
- References
Summary
Time is an international standard involving many national and international organizations that deal with the aspects of time and timekeeping. The treaty of the meter in 1875 established the Bureau International des poids et mesures (BIPM), whose activities now include time. The Conférence Générale des poids et mesures (CGPM) and the Comité international des poids et mesures (CIPM) were also established at that time. Scientific unions, such as the International Astronomical Union, the International Union of Geodesy and Geophysics, and the International Telecommunications Union, promote investigations of scientific and technical problems. Service organizations, such as the International Earth Rotation and Reference Systems Service, the International VLBI Service, International Laser Ranging Service, International GNSS Service , and International DORIS Service, deal with coordination and analysis of observations related to the Earth’s orientation.
- Type
- Chapter
- Information
- Time: From Earth Rotation to Atomic Physics , pp. 316 - 333Publisher: Cambridge University PressPrint publication year: 2018
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