The effects of higher-order scattering on intensity, degree of polarization, and direction of the plane of polarization in a molecular atmosphere have been calculated.
Inclusion of higher-order scattering changes these parameters strongly. Particularly, consideration of higher-order scattering is essential in the blue wavelength range (large optical thickness). The influence increases with decreasing zenith distance of the sun. The earth albedo augments the effect, except for direction of the polarization, which is independent of higher-order scattering.
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