The development of GPS/BDS time transfer system

This paper describes a time transfer system that allows timing laboratories, including metrology institutes and other designated institutions, to compare the local realization of Coordinated Universal Time (UTC) with each other. The time transfer system could calculate the difference between the local time and GPS time, and the difference between the local time and BDS time. It stores the measurement results in a format compatible with international standards, which has just extended to include BDS data. The system was designed to be easy to use, allowing recently established timing laboratories to begin tracing to UTC with both GPS and BDS.