3S navigation R100 preliminary implementation of GPS/GLONASS time transfer

The authors present the initial implementation of GLONASS time transfer results using the 3S Navigation R100 Integrated GPS/GLONASS receiver. GLONASS C/A Vs P code range residuals are shown. The wavelength of the carrier is much shorter than that of the code. Hence, precision of the carrier phase measurement is much higher than that of the range measurements. Integrated carrier phase residuals for both GLONASS C/A and P code are presented for comparison. GLONASS-based time transfer between two R-100 digital boards using C/A code and the accuracy improvement when integrated carrier phase is used are considered. It is shown that R-100 GLONASS C/A code signals can be used to provide real-time frequency reference and for oscillator characterization and calibration