China’s award-winning submarine radar can ‘fish for a needle in the sea’

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China’s award-winning submarine radar can ‘fish for a needle in the sea’
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France's largest internet operator Orange was on Tuesday slapped with a 50-million-euro ($53-million) fine for sending unsolicited ads disguised as emails to customers of its email service.

A Chinese radar research team’s scientific paper that plumbed new depths of underwater discovery has been recognised in this year’s awards from the international journalThe paper, which stood out among 1,278 submissions to the journal’s Best Paper Prize in October, introduced a radar technology that can detect objects at great depths with such clarity it has been likened to “fishing for a needle in the sea”.

Meanwhile, Raman scattering – the phenomenon of laser light interacting with materials to produce vibrational changes – can help to identify substances such as oil and dissolved CO2, according to the paper. The researchers reported that the radar successfully detected underwater oil spills from a distance of 12 metres using just a 1-microjoule laser pulse and a 22.4mm telescope.

Since the technology provides a chance for high-resolution laser imaging of small underwater targets, it could have potential uses in underwater archaeology, structural inspections, and military fields such as reconnaissance and submarine detection.

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