Beidou system for the first time to achieve 7000 km long baseline time comparison

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Recently, the Chinese Academy of Sciences National Time Center for the first time in the international community based on the Beidou navigation satellite 7000 km long baseline international time comparison for the Beidou system to the international development of the application of important value and milestone. The time-based benchmarking laboratory is based on the China Time Base UTC (NTSC) system, using the Beidou Common-view method, through the cooperation with the Swedish National Technology Research Center (RI.SE) To maintain the Swedish national standard time UTC (SP) to carry out the comparison test.

China / Sweden multi - mode GNSS international time comparison results

Beidou system for the first time to achieve 7000 km long baseline time comparison

The test to achieve 2.25 nanosecond comparison accuracy, in the Beidou system constellation is not perfect case (currently only observed in Europe, four satellites), the long-range performance indicators compared with the United States GPS multi-view accuracy quite. The Asia-Europe international time comparison, for the Compass compared to the formal inclusion of international atoms TAI halt compared to the link to do the technical preparation of the Beidou into international applications is of great significance.

In addition to the Swedish Technical Research Center, the Time Center Time Benchmark Lab has worked with the Spanish Naval Observatory (ROA), the National Institute of Technical Physics (PTB), the Russian National Institute of Technical Physics and Radio Engineering (VNIIFTRI) and China Taiwan Co., Ltd. (TL) and other major world time-frequency research institutions to achieve the Beidou time international cooperation intention.