Foreign Media: Major Breakthrough in China's Space Laser Communication, Continuous Transmission Over 3 Hours at 40,000 km High Orbit
The Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, announced a milestone progress in the field of space laser communication. The research team successfully and precisely captured and locked onto a geostationary orbit satellite at an altitude of 40,000 kilometers (approximately 25,000 miles) using a 1.8-meter diameter telescope at the Gao Meigu Observatory in Lijiang, Yunnan, within 4 seconds.
The experiment lasted more than 3 hours, during which the laser link maintained bidirectional uninterrupted data transmission with a rate of 1 Gbps (1 gigabit per second), which the research team called a "leading breakthrough" in high-orbit long-duration real-time communication.
Previously, laser communication between high-orbit satellites and the ground was extremely unstable, sometimes lasting only a few minutes, and there was a serious uplink-downlink asymmetry issue — the satellite downlink was fast, while the ground uplink signal was much slower.
The difficulty of high-orbit laser communication lies in the fact that atmospheric disturbances or even minute pointing deviations could cause the beam to be interrupted. The success of this experiment is seen as a key technological reserve for building future deep-space communication networks.
Original: toutiao.com/article/1858745008923843/
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