The recent in radar

Published: Friday 15 November 1996

Two new developments in radar technology -- lidar and titanium-sapphire -- are being hailed as the human being's latest weapons for assessing and controlling pollution, wind speeds and petroleum losses. These advances are related to using radar's light waves. Lidar can be used for controlling landing of aircrafts, avoiding collisions at airports, monitoring atmospheric pollution and spotting petroleum fuels in depots going up in flames. Similarly, a titanium-sapphire laser (whose ultra-violet spectrum is absorbed by pollutants like sulphur dioxide and ozone) is used in pollution control ( The Economist , September 21, 1996).

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