NDLI: Improving TWSTFT short-term stability by network time transfer

Content Provider	IEEE Xplore Digital Library
Author	Wen-Hung Tseng Shinn-Yan Lin Kai-Ming Feng Fujieda, M. Maeno, H.
Copyright Year	2009
Description	Author affiliation: National Institute of Information and Communications Technology, Tokyo, Japan (Fujieda, M.; Maeno, H.) \|\| Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan (Kai-Ming Feng) \|\| Telecommunication Laboratories, Taoyuan, Taiwan (Wen-Hung Tseng; Shinn-Yan Lin)
Abstract	Two Way Satellite Time and Frequency Transfer (TWSTFT) is one of the major techniques to compare the atomic time scales between timing laboratories. As more and more TWSTFT measurements are performed, large numbers of point-to-point two-way time transfer links have grown to be a complex network. For a future improvement of the TWSTFT performance, it is getting important to reduce measurement noise of the TWSTFT results. One of the methods is using the TWSTFT network time transfer. The Asia-Pacific network is an exceptional case of simultaneous TWSTFT measurements. Some indirect links through relay stations show better short-term stability than the direct link because the measurement noise may be neutralized in a simultaneous measurement network. In this paper, the authors propose a practicable method to improve the short-term stability by combing the direct and indirect links in the network. Through the comparisons of time deviation (TDEV), the results of network time transfer show clear improved short-term stabilities. For the links based on H-maser, the average gain of TDEV at 1h averaging times is 20%. As TWSTFT short-term stability can be improved by network time transfer, the network may allow larger number of simultaneously transmitting stations.
Starting Page	1198
Ending Page	1202
File Size	2155135
Page Count	5
File Format	PDF
ISBN	9781424435111
ISSN	10756787
DOI	10.1109/FREQ.2009.5168389
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stability Noise measurement Satellites Frequency Atomic measurements Timing Laboratories Time measurement Performance evaluation Complex networks
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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