基本説明
Filling the need for a book that conveys the current technology as well as the underlying history and physical background, this book tells physicists and engineers how to measure time to the precision required for modern-day use. The authors draw on their longstanding research experience with timekeeping and high-precision measurement to cover the use of satellites in measuring earth movement variation and the influence of the moon, while also dwelling on such topics as timekeeping aboard satellites and time transfer.
Description
(Short description)
Filling the need for a book that conveys the current technology as well as the underlying history and physical background, the authors draw on their longstanding research experience to tell physicists and engineers how to measure time to the precision required for modern-day use.
(Text)
Filling the need for a book that conveys the current technology as well as the underlying history and physical background, this book tells physicists and engineers how to measure time to the precision required for modern-day use. The authors draw on their longstanding research experience with timekeeping and high-precision measurement to cover the use of satellites in measuring earth movement variation and the influence of the moon, while also dwelling on such topics as timekeeping aboard satellites and time transfer.
Indispensable for high-precision measurements of processes in astrophysics, and relevant for measurement, navigation and communication, this monograph can be equally used as a course book or as accompanying work at advanced undergraduate or graduate level.
(Table of content)
From the contents:
Preface
1. Time-Pre 20th Century
2. Solar Time
3. Ephemerides
4. Variable Earth Rotation
5. Earth Rotation and Polar Motion
6. Ephemeris Time
7. Dynamical Time Scales
8. Clock Developments
9. Atomic Clocks
10. International Atomic Time (TAI)
11. Definition and Role of a Second
12. Coordinated Universal Time
13. Relativity and Time
14. Time in the Solar System
15. Time Transfer
16. Modern Earth Orientation
17. International Activities (BIH, IERS, BIPM)
18. Precise Time Requirements
19. Future Timekeeping
20.References
21. Acronyms
Index
(Author portrait)
Dennis D. McCarthy worked in the Time Service and Earth Orientation Departments of the U. S. Naval Observatory (USNO) for the past 40 years, reaching the position of Director of Time at USNO. He has been involved in both the developments of time keeping and time transfer, and the developments of accurate Earth Orientation observation and prediction. He is the author of a large number of papers on time scales and Earth Orientation.P. Kenneth Seidelmann worked in the Nautical Almanac and Orbital Mechanics Departments of the U. S. Naval Observatory for 35 years, reaching the level of Director of Astrometry at USNO. He has been involved in the ephemerides developments, relativistic developments of dynamical time scales, and the applications of improved accuracies of time scales and astrometry. He is currently a Research Professor at the University of Virginia. He is editor of the 'Explanatory Supplement to the Astronomical Almanac', coauthor of 'Fundamentals of Astrometry', and author of a large number of papers on astronomy.
