It Is Planned to Launch 12 Satellites in 2021 to Achieve Zero Breakthrough in Laser Communication of Domestic Satellite Constellation of Internet of Things

Learned from China Aerospace Science and industry group that the cloud project At present, the phase construction has been started. It is planned to launch 12 satellites in 2021. At that time, the global service capacity of the space-based Internet of things will be significantly enhanced.Xingyun project is the first low orbit narrow-band Internet of things satellite constellation independently invested and constructed by China Aerospace Science and industry group. Aerospace Sanjiang Aerospace Xingyun Technology Co., Ltd. is responsible for construction and operation In three phases, it is planned to build a constellation composed of 80 LEO communication satellites around 2023. Cloud engineering can effectively solve the problem of communication blind area caused by insufficient coverage of ground cellular communication network (at present, the land coverage is about 20%, and the ocean coverage is less than 5%).The day before yesterday, two-way communication with complete chain building process and stable telemetry status was realized between xingyun-2 satellites 01 and 02, which means that the laser communication payload technology carried by xingyun-2 satellite has been successfully verified, and the Chinese Satellite Internet of things constellation has achieved a breakthrough of zero inter satellite laser communication.

Inter satellite laser communication is a communication method that uses laser beam as carrier to transmit image, voice, signal and other information in space. It has the advantages of high transmission rate, strong anti-interference ability, small system terminal volume, light weight and low power consumption. It can greatly reduce the dependence of satellite constellation system on ground network, so as to reduce the number and cost of ground gateway stations, Expand the coverage area and realize global measurement and control. It is reported that the laser communication load mass of xingyun-2 satellites 01 and 02 is 6.5kg, and the on orbit power consumption is 80W.

At present, inter satellite laser link technology has become a key technology in the development of global satellite communication system. Public information shows that among the global low and medium orbit constellation projects, only Starlink constellation and LEOSAT constellation of the United States have proposed the plan of using inter satellite laser link to realize space networking. In China, Xingyun company has developed the smallest inter satellite laser communication load in China, achieved a breakthrough in the zero laser communication of the domestic satellite Internet of things constellation, and opened up the bottleneck of information transmission between Satellite Internet of things constellations.