Venerdì, 19 Ottobre 2018

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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