METHOD FOR DETERMINATION OF METEOROLOGICAL OPTICAL VISIBILITY RANGE

摘要

The invention relates to the field of meteorology, in particular, to meteorological support of aircraft takeoff and landing, road and port services, and to the field of analytical instrument engineering. The objective of the invention is to increase the precision of the optical radiation attenuation and optical visibility range measurement using forward-scatter visibility meters, and to increase service reliability of forward-scatter visibility meters. The purpose of the invention is achieved by the optical visibility range measurement method, wherein light radiation is transmitted to the scattering volume on at least three wavelengths , in two directions at angle between them, signal measurement is carried out at those wavelengths for signals passing through the common scattering volume P₁(_i) and P₃(_i) and scattered in it P₂(_i) and P₄(_i) by two receivers located opposite to the respective radiation sources; on the basis of the measured signals, spectral scattering factors at angle (,_i) are determined using the defined regression relationships; spectral attenuation values (_i) are measured; and using attenuation values at wavelengths _i corresponding to eye brightness-difference threshold, optical visibility range MOR is determined, which is equal to 3.9/(_i).