Remote Synchronization Simulation of Onboard Crystal Oscillator for QZSS Using L1L2L5 Signals for Error Adjustment

Abstract EN

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.