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LIDAR laser atmospheric research. Researcher on the Space Dynamics Laboratory mobile system using a LIDAR (Light Detection and Ranging) laser beam to conduct research into airborne particulates. LIDAR is a remote sensing technology that can be used to study and measure atmospheric properties such as density, temperature, wind, turbulence and composition. Photographed in Iowa, USA. (KEYSTONE/SCIENCE PHOTO LIBRARY/PEGGY GREB/US DEPARTMENT OF AGRICULTURE)