Abstract
ONE method of measuring atmospheric molecular pollutants at remote locations uses the Raman backscatter from a laser beam: the scattered wavelengths are characteristic of each pollutant, and their intensities give a measure of the respective concentrations1–3. But, because of the isotropic nature of the scatter, large telescopes are required to collect even a small fraction of the total scatter, and so the probing distance is small.
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FONTANA, J., HASSIN, G. & KINCAID, B. Remote Sensing of Molecular Pollutants in the Atmosphere by Stimulated Raman Emission. Nature 234, 292–293 (1971). https://doi.org/10.1038/234292a0
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DOI: https://doi.org/10.1038/234292a0
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