Note: The following sections provide an overview of the MODTRAN v5 key input variables implemented in ALG.
For further information, please read the MODTRAN5 User Manual:
A. Berk, G.P. Anderson, P.K. Acharya, & E.P. Shettle (May 2011),
"MODTRAN® 5.2.1 User's Manual document (Appendix C)", Spectral Sciences, Inc.