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.
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.
COOK
Parameter of the Cook's modification of the old Hapke function.