Chandrasekhar

class sonic.Chandrasekhar

Bases: sonic.Reflectance

This software is made available under the MIT license. See SONIC/LICENSE for details.

Constructor Summary

Chandrasekhar(AL_ss, HFuncType)

Instantiates a sonic Chandrasekhar object.

Inputs:

• AL_ss (n,m): Single-scattering albedo matrix between

  0 and 1. Note: can be scalar.

• HFuncType: (1x1 string): Implementation type of

  Chandrasekhar H-Function. Current supported inputs are:

  • “rational”

  • “linear”

  • “exact”

Outputs:

• obj (sonic.Chandrasekhar): Chandrasekhar reflectance

  model object

References

• Radiative Transfer, S. Chandrasekhar

• Spacecraft Optical Navigation, forthcoming textbook

  by John Christian

Last revised: 09/30/2024 Last author: Priyal Soni

Property Summary

AL_ss

Albedo - Single Scattering (n x m) [0, 1]

HFuncType

Type of H-function approximation: Either “exact”, “rational”, or “linear”

Method Summary

refl(inputType, var1, var2, varargin)

calculates the BRDF of a surface as described by the Chandrasekhar reflectance model.

Inputs:

• obj (sonic.Chandrasekhar): Chandrasekhar reflectance

  model object.

• inputType (string):

  • “iep” for incidence/emission/phase angles

  • “iea” for incidence/emission/azimuth angles

  • “ien” for incidence/emission/normal vectors

    – Must be column vectors, (3xn)

• var1: Must be a double or PointsS2 object

• var2: Must be a double or PointsS2 object

• varargin: REQUIRED var3 input for “ien”

  optional var3 input for “iea” and “iep”

Outputs:

• r (:,:) (double): matrix of BRDF values

Last revised: 10/02/2024 Last author: Priyal Soni