Full Utilization of TWSTT Network Data for the Short-Term Stability and Uncertainty Improvement

Author

Lin, Huang-Tien ; Liao, Chia-Shu ; Chu, Fang-Dar ; Huang, Yi-Jiun ; Tseng, Wen-Hung

Author_Institution

Nat. Time & Freq. Stand. Lab., Chunghwa Telecom Co., Ltd., Yangmei, Taiwan

Volume

60

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

2564

Lastpage

2569

Abstract

The two-way satellite time and frequency transfer (TWSTFT) is a precise time transfer technique and has being used to generate the international atomic time since 1999. Nowadays, TWSTFT links have formed a worldwide network and the large amount of TWSTFT data become highly redundant. To fully utilize the data of TWSTFT network and improve the TWSTFT results, a feasible method of processing data is proposed in this paper. According to the stability of each link, we assign a weighting value to each related equation and then solve the matrix equation with the weighted least squares method. We perform data analysis with practical time transfer data, and the results show that it is an effective method to improve the short-term stabilities and uncertainties of TWSTFT results.

Keywords

frequency measurement; least squares approximations; satellite links; stability; time measurement; TWSTT network data; international atomic time; link stability; matrix equation; short-term stability; two-way satellite time and frequency transfer; uncertainty improvement; weighted least squares method; weighting value; Delay; Equations; Europe; Numerical stability; Stability analysis; Time frequency analysis; Uncertainty; Least squares methods; matrices; satellites; time measurement; time-frequency analysis;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2010.2099330

Filename

5682403