Isotropic

class rt1_model.surface.Isotropic(**kwargs)

Isotropic (Lambertian) surface brdf.

Abstract base class for use as surface scattering distribution.

Parameters:

• ncoefs (int) – Number of coefficients used for the Legendre-approximation.

• a ([ float , float , float ] , optional (default = [1.,1.,1.])) – Generalized scattering angle parameters used for defining the scattering angle of the distribution function. For more details, see: https://rt1-model.rtfd.io/en/latest/theory.html#equation-general_scat_angle

Notes

• Only 1 expansion coefficient is required, so ncoefs is always set to 1!

• Since the distribution is independent of the scattering angle, the a parameter has no effect!

Methods

__init__(**kwargs)
calc(t_0, t_ex, p_0, p_ex[, param_dict])	Calculate numerical value of the scattering function.
calc_scattering_angle(t_0, t_ex, p_0, p_ex, a)	Generalized scattering angle with respect to the given zenith-angles.
legendre_expansion(t_0, t_ex, p_0, p_ex)	Legendre-expansion of the scattering distribution function.

Attributes

legendre_coefficients	Legendre coefficients of the BRDF.
ncoefs	The number of coefficients used in the legendre expansion.
phase_function	Phase function as sympy object.
scattering_angle_symbolic	The generalized scattering angle as a sympy expression.