An Army Illumination Model (AAIM)

Report No. ARL-TR-4645
Authors: Richard C. Shirkey
Date/Pages: November 2008; 40 pages
Abstract: An Army Illumination Model (AAIM), for use with Night Vision Goggles, has updated the Light Urban Model Effects (LUME) with new algorithms for cloud reflection; it also has been augmented with a population database for model input. In addition to providing illumination levels for cities, the model now includes values for lunar illumination under clear or (partially) cloudy skies at ground level. AAIM may be used in tactical decision aids and wargames for an observer at ground level, allowing for more accurate prediction of target acquisition ranges and increased realism in simulations. The original tenets of the initial model have been maintained - prediction of broadband brightness as a function of population and distance (>10 km) from city center under clear and overcast conditions. A technical overview of the model, along with future improvements, is presented.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2008