NTSC Scientists Realize Intracity Optical-fiber Two-way Quantum Clock Synchronization
Precise synchronization between distant clocks plays essential role in almost all types of precision measurements. In comparison with the traditional methods based on satellites, fiber optics has shown to be an advantageous channel for precise time and frequency transfer. Further cooperating with quantum technology, the fiber-optic quantum clock synchronization has shown great potential in enhancing the precision and providing better guarantee of security. To further prove its advantage in practical applications, a research team from National Time Service Center the Chinese Academy of Sciences implemented two tests of synchronization performance between clocks apart on two types of optical fiber distances (7 km intracity fiber link and 50 km laboratory fiber link).
04 24, 2022
Scientists Invent Autonomous Time Synchronization Method of Time Unified System without Traceability Data
Scientists proposed a time autonomous maintenance method with small step-by-step adjustment of the control strategy based on Autoregressive high-precision time difference prediction after a large number of experiments
12 28, 2021
Researchers Realizes Satellite-ground Precise Time Synchronization Accuracy Better than 0.5 Picoseconds
Currently for the accuracy of long-range time transfer can only reach up to 100 ps, limiting the wide application of high-precision time-frequency reference in space science. The study of the satellite-ground precise time synchronization method can provide an effective solution for developing long-range time transmission technology.
12 27, 2021The national Science and Technology Award Conference was hold in Beijing on November 3 2021. Prof. WU Yuanwei from NTSC won the National Prize for Natural in Sciences (second class).
Researchers from the National Time Service Center of the Chinese Academy of Sciences recently completed the dam deformation monitoring system.
Recently, the journal evaluation report World Journal Clout Index (WJCI) (2020 Science and Technology Edition) jointly launched by the Institute of Science and Technology Information of China and other institutions was released, and Journal of Time and Frequency sponsored by the National Time Service Center was indexed.
70th Anniversary of Beijing Time---National Time Service Center
In March 2001, the Shaanxi Astronomy Observatory was renamed as the National Time Service Center (NTSC) with the approval of the State Commission Office of Public Sector Reform. Since then, NTSC has been focusing on time service: satisfying the urgent needs of China’s development for different precision especially high precision time service
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70th Anniversary of Beiing Time---Low Frequency Time-code Time Service Station
The National Time Service Center (formerly Shaanxi Astronomy Observatory) began to study the low-frequency time code timing technology in 1993. In 1999, a practical test platform was built in Pucheng, Shaanxi Province. In 2007, a high-power low frequency time-code time service station was set up in Shangqiu, Henan Province, the call sign is BPC.
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70th Anniversary of Beijing Time---Long Wave Time Service Station
In order to meet the requirements of measurement and control of satellite launch and space technology development, the development and construction of the long wave time service station (326 project) was launched officially after the approval of the State Council in June 1973.
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70th Anniversary of Beijing Time---Shaanxi Astronomy Observatory
In the 1960s, due to the demands of large-scale economic construction, China decided to build a special time service station in the hinterland of China as soon as possible.
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