Abstract

The several advantages of Raman lidar for remote measurements of stationary source emissions were quantitatively evaluated using a calibration tank at a distance of 300 m at night. Measurements of ~10³-ppm SO₂ with a 12% accuracy were demonstrated in an observation time of 15 min using a 1.5-J ruby laser at 30 pulses/min, 6-m range resolution, interference filters, photon counting detection, and a 20-cm receiver. Measurement accuracy was checked by measuring known concentrations of SO₂ in the tank, by tuning the interference filters through the SO₂ Raman line, and by varying the CO₂ concentration to very high levels during the SO₂ measurements. Evaluation of the seriousness of induced fluorescence from plume aerosols failed due to the inability to simulate the plume aerosols.

© 1977 Optical Society of America

Remote Measurements of the Atmosphere Using Raman Scattering

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