29 April 2010 Atmospheric aerosol characterization using multiwavelength multistatic light scattering
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Abstract
A sensor for measuring scattering at multiple wavelengths and multiple angles has been designed and is being tested for the characterization of atmospheric aerosols. Charge coupled device (CCD) imagers are used to record scattering measurements at two polarizations and as a function of angle relative to the co-aligned laser beams. A diffraction grating is used to spatially separate the wavelengths across the field-of-view of the CCD array, allowing simultaneous measurements at multiple wavelengths. Experiments are conducted to measure the scattering intensities for two polarizations at discrete wavelengths that span the visible spectrum. The data from the CCD images are inverted using a genetic algorithm and Mie scatter equations to determine aerosol properties of artificially generated fog. The results are compared with in-situ measurements of the aerosol size distribution and concentration using an aerodynamic particle sizer spectrometer and a condensation particle counter.
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Andrea M. Brown, Michelle G. Snyder, Lydia Brouwer, C. Russell Philbrick, "Atmospheric aerosol characterization using multiwavelength multistatic light scattering", Proc. SPIE 7684, Laser Radar Technology and Applications XV, 76840I (29 April 2010); doi: 10.1117/12.850080; https://doi.org/10.1117/12.850080
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