Qualitative Description of Obscuration Factors in Central Europe
ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND WSMR NM ATMOSPHERIC SCIENCES LAB
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This report qualitatively describes, in elementary terms, the obscuration factors that affect electro-optical E-O systems. The obscuration factors are classified into four categories clear atmosphere, natural obscurants, battlefield obscurants, and landair interface. Basic radiation laws, Rayleigh and Mie scattering, and the changes that a beam of electromagnetic energy encounters in an atmosphere free from clouds and obstructions to visibility are discussed in the chapter on the clear atmosphere. The effects of fog, rain, snow, drizzle, clouds, haze, and dust storms upon E-O systems are discussed in the chapter on natural obscurants. Battlefield obscurants are dust, smoke, and fire resulting from battle and intentional smoke. The chapter on landair interface discusses the effect of terrain, vegetation, and ground cover upon obscuration.
- Military Operations, Strategy and Tactics
- Radiofrequency Wave Propagation