W_SOIL
Single-scattering albedo of the soil particles;
one of the classical Hapke parameter.
H_SHOE
Parameter which characterizes the soil structure in the terms of porosity
or compaction (width of opposition surge due to shadowing);
one of the classical Hapke parameter.
B_SHOE
Opposition magnitude coefficient (height of opposition surge due to shadowing);
one of the classical Hapke parameter. In some papers give the parameter S0.
The relation between both is:
B_SHOE==S0/(W_SOIL * soilPhaseFunction(0) )
THETA
Average macroscopic slope angle;
one of the classical Hapke parameter.
LE1_SOIL
Parameter of the first term of the Legendre-Polynomial soil particle
phase function.
LE2_SOIL
Parameter of the second term of the Legendre-Polynomial soil particle
phase function.