Title :
Time and frequency activities at the National Measurement Institute, Australia
Author :
Warrington, R.B. ; Fisk, P.T.H. ; Wouters, M.J. ; Lawn, M.A. ; Thorn, J.S. ; Quigg, S. ; Gajawecra, A. ; Park, S.J.
Author_Institution :
National Meas. Inst., Lindfield, NSW
Abstract :
The time and frequency group of the National Measurement Institute, Australia, (NMIA) maintains the Australian national standards for time of day and for frequency. Research and development activities of the group include: development of microwave frequency standards in the 10-15 accuracy range based on trapped Yb+ ions; development of GPS common-view time transfer systems, and the use of these systems to deliver traceable time and frequency to a client´s premises by continuous remote calibration; two-way satellite time and frequency transfer; and time and frequency dissemination around Australia by means including the recently developed NMIA ´speaking clock´ telephone service
Keywords :
Global Positioning System; calibration; clocks; frequency standards; time measurement; transfer standards; Australia; Australian national standard; GPS; National Measurement Institute; Yb+; common-view time transfer system; continuous remote calibration; deliver traceable time and frequency; microwave frequency standards; research and development activity; speaking clock telephone service; time and frequency activity; time and frequency dissemination; two-way satellite time and frequency transfer; Australia; Calibration; Frequency measurement; Global Positioning System; Measurement standards; Microwave frequencies; Research and development; Satellites; Standards development; Time measurement;
Conference_Titel :
Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-9053-9
DOI :
10.1109/FREQ.2005.1573933
