Progress in the ten years since the previous SPIE publication (Kumer, 1981) on the subject of modeling high-altitude non-LTE CO2 4.3 micron phenomena is summarized. Several models have been developed in these years. These models implement improvements in radiation transport, spectral characterization, rate constants, atmospheric models, and numerics. Applications of these models to the three distinct cases of daytime, ambient night time, and aurora are discussed, and compared with applications of the older model. Several new data bases have just become, or will soon become available. The obvious applications of the models to these data will be discussed.