Italians help make laser to measure Beijing smog

Technology result of bilateral project

Italians help make laser to measure Beijing smog

Rome, June 11 - The first pollution-hunting lasers created under an agreement between Italian and Chinese research institutes are completed and ready for transport to Beijing where they will be used for measuring the city's infamously high levels of smog, Italy's National Interuniversity Consortium for the Physical Sciences of Matter (CNISM) said on Tuesday. CNISM together with the Research Institute of Telemetry Beijing (Brit) signed the agreement to create the Laser Imaging Detection and Ranging lasers known as Lidar to help fight the pollution cap over the Chinese capital. The lasers were designed by the research team of Nicola Spinelli from the Naples University Federico II, while the component that provides the laser source was built by Bright Solutions of Pavia. "The Lidar, unlike traditional radars that send microwaves to bounce off objects allowing them to be located, uses pulses of light," explained CNISM President Ezio Puppin. "These impulses are fired into the atmosphere from a land-based laser source, where the particles to be monitored reflect the light and are then captured by a telescope below," Puppin said. By measuring the characteristics of the reflected light from dust, pollutants, sand and ash, a snapshot of the particles present in the atmosphere can be created. The laser can also be used for meteorological purposes to measure wind speed and to monitor ash from volcanic eruptions.

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