Reported by: Ji Xing
Translated by: Pang Yue
Edited by: D. Parker
Date: December 26, 2017
The Ministry of Education’s State Scientific and Technological Commission recently announced the final results of the “2017 Top Ten Major Scientific and Technological Achievements in China’s Colleges and Universities,” in Beijing. The project “high geosynchronous satellite orbit two-way satellites and ground high-speed laser communication system”, under the leadership of Professor Tan Liying was chosen for the list. This is the seventh selection for six successive years, demonstrating HIT’s strength in meeting the needs for spaceflight, while at the same time serving national defense. It is also evidence of the priority HIT gives to the integration of information and industrialization for military and civilian uses.
The high geosynchronous satellite orbit two-way satellites and ground high-speed laser communication system technology is one of the frontier areas in scientific research. It is important for overall and long-term national development strategies. The success of the project, is a symbol of China’s leadership in the space laser communication field. It is another milestone in the satellite communication area.
Featuring a high communication capacity, long transmission distance and solid confidentiality, satellite laser communication is an irreplaceable means for building the space information highway as well as the frontier scientific technology of the current international information area. Currently there are great technological difficulties in high-precision capture between satellites. Having great technological difficulties in high-presicion capture between the satellite and the ground and avoiding being affected by factors such as satellite motion, platform jittering and complex space environment to maintain high-precision continuous stable alignment of laser beams, high geosynchronous satellite orbit two-way satellited and ground high-speed laser communication system is a hot spot different countries competing in development.
On April 12, 2017, the laser communication terminal developed by the team led by Professor Tan Liying entered the orbit with the launching of the satellite. From May to August, 2017, the high geosynchronous satellite orbit two-way satellite and ground high-speed laser communication system realized precise alignment, stable maintenance and high-speed communication of beams in both directions between the satellite and the earth station. By using a two-way satellite and ground high-speed transmission passage built by laser beams, the system has successfully conducted communication data transmission, real-time forward and storage-and-forward with the highest rate up to 5 Gbps per second. This is the highest transmission data rate achieved to date in international high orbit satellite laser communication. Its performance and technical indexes all meet international high-level standards. The communication system built high-speed core passages connecting both space and ground, laying a solid foundation for the building of a space-and-ground integration information network for China in the future.
“The Top Ten Major Scientific and Technological Achievements in China’s Colleges and Universities” has been awarded twenty times since its establishment in 1998. It plays an active and critical role in enhancing the overall scientific level and scientific innovation capacity of universities. It has great social influence and a highly esteemed reputation.