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Hansen MZ and Evans 1980 Polar nephelometer for atmospheric particulate studies
Abstract A unique polar nephelometer was designed and constructed for the measurement of atmospheric particulate characteristics. The nephelometer produces visible light from a self-contained laser to irradiate an air sample drawn into the instrument. The light scattered from the particulates and molecules in the sample is detected as a function of the scattering angle for each of the four incident light polarizations. These measurements are used to determine the particulate scatetring matrix which is a function of the particle size, shape, and refractive index of the particles. The region of sensitivity for the measurements corresponds to the size range of particles that strongly affect visible radiative transfer in the atmosphere which is the primary application for the derived information. [Reprinted by permission of the Optical Society of America]
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