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The parameters of a single-mode lognormal size distribution for stratospheric aerosol are obtained from two-wavelength lidar measurements. The method is based on the measurement of the aerosol optical thickness, τ A (λ), and integrated backscattering coefficient, BI(λ), at 351 and 580 nm. The aerosol particle median radius, r m , and distribution width, σ, are obtained by comparing...