China has started building the world’s most powerful laser radar designed to study the physics of the Earth’s high atmosphere, according to state media reports and scientists informed of the project, South China Morning Post reports.
It is described as having a detection range of 1,000km (600 miles) – 10 times that of existing lasers – and will be used to study atmospheric particles that form the planet’s first line of defence against hostile elements from outer space such as cosmic rays and solar winds.
The facility, to be built on a site that remains classified, is expected to be up and running within four years and will form part of an ambitious project to reduce the risk from abnormal solar activities.
The radar will use a high-energy laser beam that can pierce through clouds, bypass the International Space Station and reach the outskirts of the atmosphere, beyond the orbiting height of most Earth observation satellites.
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But the claim has been greeted with some scepticism in the scientific world.
“I think the 1,000km is a misprint!” professor Geraint Vaughan, director of observations at the National Centre for Atmospheric Science in the UK, replied when asked about the project.
Vaughan, who is also a Fellow of the Royal Meteorological Society, said that while he thought the Chinese announcement was “very interesting”, it did not seem possible with existing technology.