Recently, the 49th Beidou navigation satellite has been successfully launched by long march 3B carrier rocket, which makes up the key step for Beidou-3 navigation satellite system project. There are 3 tilted geostationary orbit (IGSO) satellites in Beidou-3 system, they all carry a high-rail laser communication terminal developed by IOE. This means the beginning of high-rail multi satellite link space-based laser communication in China. 

The Beidou-3 series high-rail laser communication terminal developed by IOE’s space-based laser communication team achieves high-speed communication between satellites in high orbit, meanwhile, they also realize satellite-ground broadband high speed communication. The terminal breaks through a number of key technologies and performs on-orbit verification, which means China has successfully mastered the core technology of high orbit laser communication.