Lidar stands for Llght Detection and Ranging. Laser radars or lidars, which are optically the closest counterparts of conventional rnicrowave radars, take advantage of the relatively strong interaction of laser light with atmospheric constituents. They offer superior spatial and temporal resolution and are effective remote sensing instruments. Wind, Raman, and other lidar sensing instruments encompass a wide range of systems-unprecedented long-range wind, aerosol, and molecular chemical probes that find striking applications in the field of pollution and environmental monitoring, meteorology, and in aeronautics (as early-waming systems).

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