Abstract

A spectral nephelometric method for the determination of the meteorological optical range is proposed; the proposed method improves the accuracy and operational reliability by eliminating the systematic errors caused by changes in the environment and hardware properties of the measuring system. The method includes the irradiation of the scattering medium volume with three different wavelengths in two directions and the determination of the spectral values of the attenuation rates σ(λi) using the established regression relationships between σ(λi) and the scattering coefficients at an angle φ, σ(φ). The effectiveness of the proposed method is estimated. The viability of this method in determining the visual range on runways is demonstrated in terms of achieving reliably safe take-off and landing of aircraft.

© 2020 Optical Society of America

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