This chapter describes the solution to the the plane-parallel, radiative transfer equation in an inhomogeneous atmosphere, how it is implemented numerically, and a summary of various accuracy tests performed against other models.
Before continuing, a summary of the indices used and what
they represent are provided in the table below.
| Index | Total | Represents |
| i(i') | Ni | Height index |
| j(j') | Nj | Zenith angle (Gaussian-Quadrature) index |
| k(k') | Nk | Azimuth angle index |
| l | Nl | Species (or scatterer) index |
| m | M | Fourier expansion harmonic |
| n(n') | N | Order of scattering |