The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지

A Study on Remotely Located Synchronization System using GPS Common-View Method

GPS Common-View 방식에 의한 원격지 동기 시스템 연구

  • 김영범 (한국표준과학연구원 광기술표준부) ;
  • 정낙삼 (한국표준과학연구원 광기술표준부) ;
  • 박동철 (충남대학교 공과대학 전파공학과)
  • Published : 2001.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

A remotely located synchronization system which is locked to the remote master clock has been implemented by using GPS Common-View technique. The measurement results showed that the accuracy of the remote synchronization system could be kept within a few parts in $10^{-12}$ and MTIE(Maximum Time Interval Error) met the ITU-T Recommendation(G.811). A prototype system having fully automatic operational functions has been realized up to now and is expected to be used in the network synchronization in the near future.

GPS Common-View 방식에 의해 원거리의 기분클럭에 위상동기되는 원격지 동기 시스템을 설계하고 제작하였다. 이원격지 동기 시스템의 측정결과 $10^{-12}$의 주파수 정확도를 유지하였으며 ITU-T 의 권고(G.811)를 만족하는 MTIE 특성을 보여주었다. 현재 전체적으로 자동화 기능을 갖는 초기모델이 구현되었으며 가까운 시일 내에 통신망 동기용으로 사용 될 수 있으리라 기대된다.

Keywords

References

  1. Crystal Oscillator Design and Temperature Compensation M. E. Frerking
  2. British Telecommunication Engineering v.3 Synchronization and Slip Performance in Digital Network R. Smith;L. J. Millott
  3. HP Journal v.19 no.4 Flying Clock' Comparisons Extended to East Europe, Africa and Australia using portable atomic clocks LaThare N. Bodily;Ronald C. Hyatt
  4. Proc. of the IEEE v.79 no.7 GPS Time Transfer Wlodzimierz Lewandowski;Claudine Thomas
  5. Proc. of the IEEE v.79 no.7 Two-Way Time Transfer Via Communication Satellite Diter Kirchner
  6. Proc. of the IEEE v.79 no.7 Satellite Broadcasting of Time and Frequency Signals A. Sen Gupta;Ashok K. Hanjura;Bhupendra S. Mathur
  7. 44th Annual Symp. on Frequency Control A Rubidium Freq. Standard and GPS receiver : A Remotely Steered Clock System with Good short-term and long-term stability David W. Allan
  8. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control v.34 Time and Frequency(Time-Domain) Characterization, Estimation, and Prediction of Precision Clocks and Oscillator Davad W. Allan
  9. ITU-T Recommendation G. 810 Definitions and Terminology for Synchronization Network
  10. ITU-T Recommendation G. 811 Timing Characteristics of Primary Reference Clocks