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Beidou Achieves Real-time Transmission of Deep-sea Data at 6000m Depth

Feb 22, 2019

China has achieved real-time transmission of deep-sea data at 6,000-meter depth through Beidou satellites for the first time in an ocean expedition. Experts said it was a major breakthrough and largely improved the transmission's stability, precision and safety. 

The technology solved disadvantages of small payload volume, low power supply and huge data size of deep-sea subsurface buoys and reduced dependence on foreign communications satellites, said WANG Fan, director of the Institute of Oceanology, Chinese Academy of Sciences (IOCAS). 

"Another technology of combining inductive coupling and underwater acoustic communication has been used to extent the transmission to 6,000 meters from previously 3,000 meters," WANG added. 

They are among the breakthroughs Chinese scientists onboard research vessel Kexue, or "Science", made during their latest mission into the West Pacific. The vessel returned to its home port in the Qingdao West Coast New Area in Qingdao, Shandong province on Thursday. 

"The utilization of Beidou satellites was part of upgrade of China's scientific observation network in the West Pacific," said WANG Jianing, chief scientist of this expedition starting in mid-November. 

The researchers developed multi-module communication and transmission technology to make sure quantities of data acquired by subsurface buoys could be transmitted to laboratories on land every hour. They also updated batteries and optimized sites for 20 units of subsurface buoys. 

According to IOCAS, currently, China also has four units of big buoys and movable onboard monitoring facilities in the West Pacific. With the facilities, relevant data has been gained stably during the past five years, and the data was applied in deep-sea research as well as climate and marine environment forecast. 

The vessel "Kexue" sailed more than 12,000 nautical miles during the 74-day mission, the longest distance and time it has covered outside the country since its maiden voyage. 

 

 

Chinese research vessel Kexue, returns to Qingdao on Jan 31, 2019, from a scientific expedition to the West Pacific. (Image by IOCAS) 

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YANG Fengfan

Institute of Oceanology

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