Note: The following sections provide an overview of the MODTRAN v6 key input variables implemented in ALG.
For further information, please read the MODTRAN6 User Manual:
A. Berk, J. van den Bosch, F. Hawes, T. Perkins, P.F. Conforti, G.P. Anderson, R.G. Kennett , & P.K. Acharya (August 2017),
"MODTRAN® 6.0 User's Manual", Spectral Sciences, Inc.