Some remarks on the CCTF CGGTTS format

The CCTF CGGTTS data formats are used worldwide in the applications of various societies from the UTC/TAI production and scientific studies to all levels of commercial usages. Its design was based on the GPS receiver technique in the 1980s. With the progress of the new GNSS receivers and new T/F transfer techniques, its short points are becoming evident, e.g. the convention that for a tracking arc of 16 minutes only 13 minute data are recorded. In this paper, we discuss the outdate points in the CGGTTS format and how to improve it toward a new CGGTTS convention, namely V03. The new and old versions can co-exist for different applications.