LIDAR equipment measuring air pollutants

LIDAR equipment measuring air pollutants

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Credit: PASCAL GOETGHELUCK/SCIENCE PHOTO LIBRARY

Caption: Pollution monitoring. Researcher operating LIDAR (Light Detection and Ranging) equipment from the back of a truck. LIDAR equipment can measure the composition of clouds of pollutants in the atmos- phere over a 100 kilometre range. It works because each type of molecule molecules absorbs different and specfic wavelengths of light. LIDAR fires a laser (green beam of light) of a specific wavelength into the sky. The equipment measures the intensity of the light reflected back. From this the absorbtion of light can be calculated and hence the level of the specific pollutant. LIDAR was developed at Lausanne Polytechnic (EPFL), Switzerland. Photographed in Lausanne.

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Keywords: air, air pollution monitoring, environment, environmental, epfl, equipment, lidar, lidar equipment, monitoring, pollution, pollution monitoring, pollution research, pollution testing, switzerland, truck

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