Photometric Functions
From krc
This is only active if there is not an atmosphere; the Delta-Eddington model used to handle atmospheric opacity includes the assumption that the surface is Lambertian.
In some later version when more input parameters are available, it is intended to be allowed when there is an atmosphere.
Photometric function include Lambertian, Lommel-Seeliger, Kheim / Lunar-Like, Minnaert (see V34UG.pdf for formalism).
Users can set the photometric function by setting PhotoFunc:
Contents |
Minnaert
PhotoFunc = [-1.-0.[ ALBEDO = [0-1]
with Minnaert coefficient = abs(PhotoFunc)
Keihm / Lunar-like
PhotoFunc = ]0.-1.[ ALBEDO = [0.-1.]
For Lunar-like (Kheim=0.25, Vasavada=0.375).
Lambert
PhotoFunc = 2 ALBEDO = [0.-1.]
Lommel-Seeliger
PhotoFunc = 3 ALBEDO = [0.-1.]
