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Remote Synchronization Simulation of Onboard Crystal Oscillator for QZSS Using L1/L2/L5 Signals for Error Adjustment

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Author(s): Toshiaki Iwata | Michito Imae | Tomonari Suzuyama | Yuji Hashibe | Satoshi Fukushima | Akira Iwasaki | Kenji Kokubu | Fabrizio Tappero | Andrew G. Dempster

Journal: International Journal of Navigation and Observation
ISSN 1687-5990

Volume: 2008;
Date: 2008;
Original page

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 and a synchronization error of less than 0.77 nanosecond was realized.
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