Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2010, Vol. 7, No. 4, pp. 147-157
The phase function asymmetry parameter dependence
on scattering media properties
M.A. Lobanova
1, A.V. Vasilyev
2, I.N. Melnikova
31 Baltic State Technical University «Voenmeh» of D.F. Ustinov, 190005 Saint-Petersburg, 1-st Krasnoarmeiskaya str., 1
2 Saint-Petersburg State University, V. A. Fock Institute of Physics, 198504 Saint-Petersburg, Petrodvorets, Ul'yanovskaya st., 1
3 Russian State Hydrometeorological University, 195196 Saint-Petersburg, Malookhtinsky prospect 98
Phase function is important characteristic of the interaction between radiation and turbid medium. In a general way
it is not expressed as an explicit function so that it is tabulated. However, while solving most applied problems (active
and passive remote sensing problems, direct and inverse problems of the atmospheric optics and ecological
monitoring of the atmosphere) it is desirable to have its analytic representation. Thats why different approximations
are in use. One of the most popular phase function approximation is Henyey-Greenstein function which is suitable
for its single asymmetry parameter g and can be easily expanded as a series of Legendre polynomials. In spite high
use of this function and its parameter g in practical applications until today detailed study of g value dependence on
turbid medium characteristics hasnt been done. In this paper we present the parameter g dependence on radiation
wavelength, aerosol distribution function, mean particle size and index of aerosol refraction. Plots of corresponding
correlations for ensembles of water and ice particles are received.
Keywords: light scattering, phase function, asymmetry parameter, scattering angle, size distribution function
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