China declassifies tech of world’s first high orbit radar satellite, worrying US

China has unveiled the technology behind its Ludi Tance 4-01 (Ludi) satellite, the world's first geosynchronous orbit synthetic aperture radar (SAR) satellite, providing continuous surveillance of one-third of Earth's surface. Launched in August 2023, Ludi orbits at 36,000km, far exceeding the altitude of US remote-sensing radar satellites, and utilizes a unique "space power combination" system to achieve high-resolution radar emissions that can penetrate cloud cover and darkness.

The satellite's technology merges multiple microwave beams in space, enabling stable radar emissions. While Beijing claims Ludi is for civilian use, such as weather observation, disaster prevention, and research in various fields, the US military remains cautious. They suggest Ludi could enhance China's tracking and targeting capabilities when coordinated with other surveillance satellites.

via SCMP Full Text Feed
 
 
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