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China achieves breakthrough in high-orbit satellite-ground laser communication_城市资讯网

observatory in Southwest China's Yunnan province and a geosynchronous satellite.    At distances of up to 40,740 kilometers, they achieved both uplink and downlink two-way communi

demy of Sciences' Institute of Optics and Electronics, in collaboration with the Beijing University of Posts and Telecommunications, the China Academy of Space Technology and other institutions, has e

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