Investigation of the use of the resonance Raman effect as an environmental monitor

作者: O. Chamberlain , P. Robrish , H. Rosen

DOI: 10.2172/7332229

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摘要: An essential element in any strategy designed to cope effectively with atmospheric pollution is the development of more sensitive or convenient methods for determining concentrations pollutant gases ambient air and emissions from localized sources. One general class measuring makes use lasers probe atmosphere remotely obtain spectroscopic information about molecules present segment under consideration. In particular, a laser measure Raman spectra molecular constituents seems offer some promise being an effective monitor gaseous pollutants. This scheme, called Lidar, implemented manner analogous radar system. A transmitter directs pulsed beam into atmosphere. By time between initial pulse returning signal, one determines range region monitored. The light coming this spectroscopically analyzed. spectrum, which due transitions vibrational states molecule, unique signature particular species. Therefore, measurement its intensity allows determine concentration that molecule inmore » interest. Lidar one, principle, make three-dimensional map real good spatial resolution out distance several kilometers fixed transmitter.« less

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