The latest version of the Strategic High-Altitude Radiance Code, is now ready for distribution. It calculates atmospheric radiation and transmission for arbitrary paths between 50 and 300 km altitude. The new version contains significant upgrades which include a fully integrated auroral model with time-dependent chemistry, extension down to 50 km altitude and the important isotopes of CO2.
E. H. Takken, E. H. Takken,
"Extended spatiotemporal nonstationary scence generation", Proc. SPIE 1725, Targets, Backgrounds, and Discrimination, 17250A (29 January 1991); doi: 10.1117/12.2300210; https://doi.org/10.1117/12.2300210