Level 2 Help for PHO_HAPKE_86_HG2

Single-scattering albedo of the soil particles; 
one of the classical Hapke parameter.

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.

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) )

Average macroscopic slope angle;
one of the classical Hapke parameter. 

Parameter of the first term of the Henyey-Greenstein soil particle 
phase function.

Parameter of the second term of the Henyey-Greenstein soil particle 
phase function.

Asymmetry parameter (weight of the two terms 
in the Henyey-Greenstein soil phase function).