Modtran (R) 6(1) Generated Single Scattering Adjacency Function

A new MODTRAN6 output file and post-processing utility has been written to enable generation of single scattering adjacency (aka point spread) functions. The approach relies on Helmholtz reciprocity. A series of MODTRAN single scattering solar radiance calculations are performed to build up a table of adjacency file segment contributions. Changes to the MODTRAN source were minimal, and the post-processing utility can rapidly define the adjacency function at fine spatial resolution. The basic approach is presented along with sample output.