Test laser pointer to realize laser communication

“80 satellites carrying IoT communications will be launched by 2023 to achieve global coverage.” On the 24th, the fourth “China Space Day” series of events were held at Wuhan National Aerospace Industry Base, Deputy General Manager of Aerospace Cloud Technology Co., Ltd. Du Li said that Xingyun Project will launch two test satellites, Xingyun II 01 and 02 this year, and the satellites will conduct “dialogue” through laser links.

As an important part of the “five clouds and one vehicle” commercial aerospace project led by China Aerospace Science and Industry Corporation, the Xingyun project aims to build my country’s first low-orbit narrowband communication satellite constellation and build a space-based Internet of Things to achieve a global scale Real-time transmission and effective connection of intelligent terminal data such as various information nodes and sensors.

Space-based Internet of Things involves three aspects of communication, namely, satellite communication, satellite-to-ground communication, and satellite-to-object communication. Duli said, “The satellites in the sky will form an ‘inter-satellite Internet’ to transmit information. Before they used radio waves to ‘transmit information’, they are now upgraded to use laser pointer links to transmit information.”

“After the first two test stars went up, we mainly did three tests.” According to Duli, the first test tested the mutual response between the satellites in the sky and the measurement and control center on the ground; the second tested the relationship between the satellites and the satellites. Whether it can implement fast communication through the green laser pointer link; the third test is to test the data transmission capability of the satellite and the ground Internet of Things collection terminal. The supporting measurement, operation and control center is under construction in Wuhan Aerospace Industry Base.

According to reports, the Xingyun project will be implemented in three phases: the launch of two test stars will be completed this year, 12 satellites will be launched in 2020, and 80 satellites will be launched in 2023 to form a space-based Internet of Things system covering the world, which will be widely carried out. Promotion in domestic and foreign markets.