Abstract

Fog spectral transmission data generated in the Electro-Optical Test Facility and propagation models used by the authors are presented. Preliminary results of a modeling effort are presented that support the following conclusions: (1) atmosphere emission is a major factor in IR system performance despite the fact it is commonly omitted; (2) the 3.5–4.1-μm interval offers superior performance to the 3–5 band at both relatively short and long ranges; and (3) the longer wavelength 9.5–11.5-μm band is superior to either the 3–5 or 3.5–4.1 bands in the presence of fog.

© 1980 Optical Society of America

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