Solar radiation Rayleigh scattering

Thermodynamic Availability of Solar Radiation with Special Attention to Atmospheric Rayleigh Scattering... 

Both these effects require knowledge of the spectral and spacial radiation distributions of the radiation flux on a surface. The determination of both these distributions at a given location is a difficult instrumentation problem. In this paper, the effect of scattering processes in the atmosphere on the available energy of solar radiation on a surface is examined. Both the spectral and spacial effects of Rayleigh scattering are demonstrated. 

In the calculations of the available energy flux reported In this paper for Rayleigh scattered solar radiation, the following assumptions and procedures have been utilized. 

Table I. Available Energy to Energy Flux Ratio for Rayleigh Scattered Solar Radiation as a Function of Wavelength...

Table V. Equivalent Temperature of Rayleigh Scattered Solar Radiation for Clear Sky Conditions ...

Figure 7. Fraction of direct solar radiation scattered by molecular constituents of the atmosphere (Rayleigh scattering) as a function of wavelength.

The computational procedure for the calculation of energy flux per unit frequency per unit solid angle eV(0 due to Rayleigh scattered solar radiation is outlined in this section. 

Fig. 5.48 Spectral irradiance EBX J, of extraterrestrial solar radiation and Ex,a of direct solar radiation at the ground for a pure, cloudless atmosphere with mr l = 1-5. The curve indicated by rA,R-E A°n represents the attenuation caused by Rayleigh scattering alone. The dark areas indicate the absorption by each of the gases written on the graph (/io3 = 0.30 cm, w = 2.0cm)...

Here, the first term on the right hand side is the irradiance due to direct solar radiation, from (5.124) and (5.125) ERa indicates the irradiance of diffuse radiation from Rayleigh scattering by air molecules, Ede the irradiance of diffuse radiation... 

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