Title :
Remote Synchronization of Onboard Crystal Oscillator for QZSS Using L1/L2/L5 Signals for Error Adjustment
Author :
Iwata, Toshiaki ; Imae, Michito ; Suzuyama, Tomonari ; Iwasaki, Akira ; Kokubu, Kenji ; Hashibe, Yuji ; Fukushima, Satoshi ; Tappero, Fabrizio ; Dempster, Andrew
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol. (AIST), Tsukuba
fDate :
May 29 2007-June 1 2007
Abstract :
A new error adjustment method for remote synchronization of the onboard crystal oscillator for the quasi-zenith satellite system (QZSS) using three different frequency positioning signals (L1/L2/L5) is proposed. The error adjustment method that uses L1/L2 positioning signals was demonstrated in the past. In both methods, the frequency-dependent part and the frequency-independent part were considered separately, and the total time information delay was estimated. By adopting L1/L2/L5, synchronization was improved by approximately 15% compared with that using L1/L2 and approximately 10% compared with that using L1/L5.
Keywords :
crystal oscillators; synchronisation; error adjustment method; frequency positioning signals; frequency-independent part; onboard crystal oscillator; quasi-zenith satellite system; remote synchronization; time information delay; Atomic clocks; Delay effects; Delay estimation; Frequency estimation; Frequency synchronization; Global Positioning System; Oscillators; Satellite broadcasting; Space technology; Stability;
Conference_Titel :
Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International
Conference_Location :
Geneva
Print_ISBN :
978-1-4244-0646-3
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2007.4319289
