INTELSAT two-way time transfer experiments among Japan, Korea, and Taiwan

Author

Engelkemier, B.S. ; Imamura, K. ; Takahashi, F. ; Yoshino, T. ; Chung, Nak Sam ; Liao, Chia-Shu

Author_Institution

Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan

Volume

44

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

98

Lastpage

102

Abstract

The first two-way time transfer experiments using an INTELSAT Ku-band satellite in eastern Asia in cooperation between the Communications Research Laboratory (CRL, Japan), Korea Research Institute of Standard and Science (KRISS, Korea), and the Telecommunication Laboratory (TL, Taiwan) were carried out during 1992. The CRL-KRISS experiment attained a short term precision of better than 1 ns. The CRL-TL experiment suffered from a low C/N₀ ratio which made the short term precision greater than 1 ns. The long term averaged residuals contained a periodic noise signal which we believe was the result of a Doppler shift in the frequency of the signal caused by the relative motion of the satellite. A MITREX compatible modem under development at CRL exhibited a linear correlation with frequency offsets that were similar to the noise in the data

Keywords

Doppler effect; Doppler shift; measurement standards; random noise; satellite communication; time measurement; 1 ns; CRL; Communications Research Laboratory; Doppler shift; INTELSAT two-way time transfer experiments; Japan; KRISS; Korea; Korea Research Institute of Standard and Science; Ku-band satellite; MITREX compatible modem; TL; Taiwan; Telecommunication Laboratory; eastern Asia; frequency offsets; linear correlation; periodic noise signal; short term precision; Additive noise; Clocks; Delay; Extraterrestrial measurements; Frequency; Laboratories; Modems; Satellites; Time measurement; Transponders;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.377782

Filename

377782