Title :
Sagnac Effect and Diurnal Correction on Two-Way Satellite Time Transfer
Author :
Tseng, Wen-Hung ; Feng, Kai-Ming ; Lin, Shinn-Yan ; Lin, Huang-Tien ; Huang, Yi-Jiun ; Liao, Chia-Shu
Author_Institution :
Telecommun. Labs., Chunghwa Telecom Co., Ltd., Taoyuan, Taiwan
fDate :
7/1/2011 12:00:00 AM
Abstract :
Precision of two-way satellite time and frequency transfer (TWSTFT) highly depends on the residual nonreciprocity delays; one of them is caused by the Sagnac effect. In this paper, we employ the satellite ephemeris data to compute the precise Sagnac effect and discuss the possible additive effect related to the Sagnac effect. We also describe a method to calculate the diurnal correction based on the time derivative of the Sagnac effect. Through the analysis of the link between the National Institute of Information and Communications Technology in Japan and the Telecommunication Laboratories in Taiwan, we demonstrate that the correction was useful to improve the TWSTFT data. The time deviation at an 8-h averaging time is reduced from 346 to 156 ps after the correction.
Keywords :
Sagnac interferometers; satellite communication; Japan; National Institute of Information and Communications Technology; Sagnac effect; Taiwan; Telecommunication Laboratories; diurnal correction; residual nonreciprocity delays; satellite ephemeris data; time 346 ps to 156 ps; time 8 h; two-way satellite frequency transfer; two-way satellite time transfer; Asia; Delay; Earth; Laboratories; Sagnac interferometers; Satellites; Semiconductor device measurement; Doppler measurements; relativistic effects; satellite navigation systems; satellite tracking; time measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2010.2095542
