Airborne dust, smoke, and debris can significantly degrade a battlefield environment and affect electro-optical systems. The most direct effect of these combat-induced aerosols on a propagating electromagnetic signal is to remove energy (reduce transmission) through absorption and scattering. Reduced transmission through inventory smokes and dust is generally most significant at visual and infrared wavelengths but is less severe at millimeter wavelengths. Obscurant concentrations can change rapidly in a combat environment. Once generated, an aerosol cloud moves with the wind, undergoes thermally buoyant rise, and expands in the atmospheric turbulence. Thus, prevailing winds; aerosol generation factors; and the geometry between targets, observers, and aerosol clouds are important in determining transmission. The Combined Obscuration Model for Battlefield Induced Contaminants (COMBIC) predicts time and spatial variations in transmission through dust and debris raised by high energy explosives and by vehicular movement; smoke from phosphorus and hexachloroethane munitions; smoke from diesel oil fires; generator-disseminated fog oil and diesel fuel; and other screening aerosols from sources defined by inputs. COMBIC has been designed primarily for large scenarios where many different obscuration sources are present and where many observer-target lines of sight (LOS) must be treated simultaneously.

PcEosael Overview
Alphabetical List of EOSAEL Modules
Functional List of EOSAEL Modules

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