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The windows version of the Night Vision Thermal Imaging System Performance Model, NVTherm, was released in March 2001. NVTherm provides accurate predictions of sensor performance for both well-sampled and undersampled thermal imagers. Since its initial fielding in March 2001, a number of improvements have been implemented. The most significant improvements are: (1) the addition of atmospheric turbulence blurring effects, (2) National Imagery Interpretability Rating System (NIIRS) estimates, (3) and the option for slant-path MODTRAN transmission. This paper presents these modifications, as well as a brief description of some of the minor changes and improvements that have been completed over the past year. These significant changes were released in January 2002.
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Tana Maurer, Ronald G. Driggers, Richard H. Vollmerhausen, Melvin H. Friedman, "2002 NVTherm improvements," Proc. SPIE 4719, Infrared and Passive Millimeter-wave Imaging Systems: Design, Analysis, Modeling, and Testing, (29 July 2002); https://doi.org/10.1117/12.477448