In calculating the diffuse part of the RTE we have to take into account the following components:
The loss as a result of extinction:
The gain as a result of multiple scattering:
The gain as a result of single scattering of solar radiation:
The gain as a result of reflection of light from the surface:
The gain as a result of emission:
where
| θ | zenith angle; |
| μ | cos(θ); |
| φ | azimuth angle; |
| ε | emission coefficient (= absorption coefficient); |
| ζ | scattering coefficient; |
| Fsol | flux from the sun; |
| P | weighted phase function for scattering; |
| A | surface albedo; |
| B | Planck radiation; |
| τ | optical depth; |
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