Abstract
The author computed the intensity of scattering at 5000m level in four wave-length ranges, and obtained the intensity distribution on the blue sky dome. Each of four partial solar radiation's energies contained in the wave-length ranges 0-0.5190 μ-0.7077 μ-1.0575 μ-∞ is equal to one fourth of the total energy and are denoted by I, II, III and IV.
Let h be the sun's altitude, A and θ the azimuth relative to the sun and the altitude of the portion of sky dome, respectively.
The intensity of first scattering increases with decreasing wave-length for each A and θ except for h=0 and θ=0, where the domain II has the greatest intensity from A=0 to A=120°, but III in A=150°, 180°.
For the altitude higher than h=30°, the intensity decreases with increasing θ for each range and A, for h=0 in domain I it is greatest at θ=30° and decreases to both sides from it, further in domains II, III and IV it decreases with increasing θ. The conditions of secondary scattering is the same with the primary for h_??_30°. In h=0, the intensity decreases with increasing θ in each range and A, and II has maximum for all A and θ.
The conditions of the total scattering are identical with the primary.
The intensity of total scattering for total wave-length range decreases with increasing θ for all h. The horizontal intensity due to total scattering increases with increasing altitude and decreasing wave-length, and therefore the value for total wave-length range increases with increasing altitude.
The horizontal intensity due to total radiation increases with increasing h for each range, and decreases with increasing wave-length for h=0, but it is inverted for h_??_30°.
