The research team from the National Time Service Center (NTSC), Chinese Academy of Sciences (CAS), investigated the rapid convergence of BDS/GNSS real-time satellite clock estimation. To address the long convergence time of conventional methods, the team proposed a Time-Differenced Carrier Phase (TDCP)-assisted undifferenced real-time satellite clock estimation approach, significantly improving the convergence performance of BDS/GNSS real-time satellite clock products.

On February 11, 2026, the International Bureau of Weights and Measures (BIPM) released the latest issue of its Time Bulletin (Circular T 457). The strontium optical lattice clock NTSC-Sr2, developed by the National Time Service Center (NTSC) of the Chinese Academy of Sciences, was used as a secondary representation of the second to calibrate International Atomic Time (TAI), marking the first time that an optical clock from China has contributed to steering TAI.

A research team from the National Time Service Center (NTSC), Chinese Academy of Sciences (CAS), studied the probability distribution and fitting accuracy of the ephemeris parameters of LEO satellites flying at different altitudes, revealing the key aspects that require attention in the generation of LEO navigation satellite ephemeris.