Real-time precise timing using GNSS carrier phase observation from single receiver

Abstract

Precise timing by the technique of GNSS common view is proven to be an effective technique with the accuracy of nanosecond level in real-time mode. The timing technique of carrier phase is also applied in post mode with the accuracy of sub-nanosecond level, but the real-time mode still has little explicit research. In this study, we develop the precise timing algorithm of carrier phase to investigate timing performance o in real-time mode. The four stations from the International GNSS Service (IGS) data network are processed, which are equipped high performance external time frequency. And then three kinds of satellite orbit and clock products with its corresponding accuracy and latency are applied into the timing algorithm for investigate the timing accuracy with different time latency. The RMS is achieved with 0.35ns level by the IGS rapid satellite orbit and clock product, and then the prediction of the IGS ultra rapid product is about 0.52ns.