DocumentCode :
2090546
Title :
Practical performance of the UTC(CH.R) real time realization of UTC(CH) and prospects for improvement
Author :
Bernier, L.-G. ; Dudle, G.
Author_Institution :
METAS-Swiss Fed. Office of Metrol. & Accreditation, Bern
fYear :
2004
fDate :
5-7 April 2004
Firstpage :
170
Lastpage :
174
Abstract :
UTC(CH.R) is a hardware real-time realization of UTC(CH) generated from the reference cesium clock by means of a micro-phase-stepper. The purpose of the steering algorithm is to keep UTC(CH.R) as close as possible to UTC(CH) by means of a time-frequency control loop which must be stable despite the delay of 1 d between the epoch of the last computed state and the epoch of the daily steering. The paper presents the practical performance of the UTC(CH.R) realization based on measurement data recorded from April 2002 to April 2003. The performance of the UTC(CH.R) steering algorithm is compared against simulation results that apply alternative steering algorithms to the same free running clock data. In conclusion plans to use a hydrogen maser instead of a cesium clock for the generation of a future, improved UTC(CH.R) are discussed.
Keywords :
atomic clocks; caesium; frequency measurement; time measurement; UTC(CH) realization; UTC(CH.R); cesium clock; hardware real-time realization; hydrogen maser; microphase-stepper; steering algorithm; time 1 d; time-frequency control loop; prediction methods; steering; timescales;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Frequency and Time Forum, 2004. EFTF 2004. 18th European
Conference_Location :
Guildford
ISSN :
0537-9989
Print_ISBN :
0-86341-384-6
Type :
conf
Filename :
5074932
Link To Document :
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