Two-stream reflectance and transmittance of one homogeneous layer. More...

#include <ERF_TwoStreamSW.H>

Collaboration diagram for TwoStreamLayerSW:

Public Attributes
amrex::Real	R_dif

amrex::Real	T_dif

amrex::Real	R_dir

amrex::Real	T_dir

amrex::Real	T_noscat

Detailed Description

Two-stream reflectance and transmittance of one homogeneous layer.

All quantities are fractions of the incident flux:

R_dif, T_dif: reflectance and transmittance for diffuse incidence.
R_dir, T_dir: diffuse flux reflected upward / transmitted downward per unit direct-beam flux incident at the top of the layer (the scattered part only; the surviving direct beam is T_noscat).
T_noscat = exp(-tau / mu0): direct-beam transmittance.

For a non-absorbing layer (omega = 1) R_dif + T_dif = 1 and R_dir + T_dir + T_noscat = 1. For a non-scattering layer (omega = 0) R_dif = R_dir = T_dir = 0 and T_dif = exp(-2 tau) (diffusivity factor 2).