A high -precision time -frequency system was released at the First International Summit on BeiDou Navigation Satellite System (BDS) Applications held in Changsha, Hunan Province, September 16.
The BeiDou research team at the National University of Defense Technology (NUDT) said the system has improved the precision of time service. The high-precision all-optical transmission architectural time -frequency system was developed based on the team's own intellectual properties.
As the core of a navigation satellite system, the time -frequency system directly determines the accuracy of satellite navigation timing.
With the new system, the time reference of BDS -3 can be controlled to within one second for every 3 million years, 10 times more accurate than the previous system, which has reached the advanced level in the field of satellite navigation around the world.
The BeiDou research team at NUDT has made breakthroughs in key techniques, including high - precision optical fiber time -frequency transmission and high -stability synthetic atomic clock, and applied them to the BDS. Thus the key components to support high-precision time frequency are all developed domestically.
High -performance time service is very important, because the stable operation of communication, electricity, finance and other systems depends on reliable time synchronization.
The research team has carried out in-depth research on time-frequency including its high stability generation, high security transmission, high precision measurement, and high performance monitoring, so as to solve the bottleneck problems of high -precision traceability and remote transmission under the new architecture of the BDS -3 ground system.
An innovative approach was devised to realize high -precision time-frequency transmission based on optical fiber, and a distributed time -frequency system with high reliability and low complexity was developed after years of efforts.
The BeiDou team's achievements, represented by long-distance, high-precision and high-security time-frequency transmission technology, are being applied to satellite navigation and time-frequency systems.
There will also be broader application of these advanced technologies, for example, in measurement and testing, intelligent systems, mobile communications and scientific research.