A generic texture routine was developed for upgrading smooth obscurant cloud models by introduction of time and space dependent fluctuations in line of sight (LOS) propagation and image generation. The routine runs separately from or in conjunction with other obscuration models that predict electro-optical (EQ) propagation for mean or average aerosol concentration contributions in the obscurant cloud. Atmospheric turbulence and eddy structures are the underlying ...
Fifteen electro-optical obscuration models in use within the Army are examined in terms of input and output requirements, and eighteen data bases from major Army obscuration effectiveness tests are examined and summarized. Tables showing side-by-side model data requirements and test measurements on hand are presented along with short descriptions of each model and test. The results are discussed in relation to strengths and deficiencies in current modeling and testing capabilities. ...
The general problems of using high frequency direction finding techniques as an accurate means of surveillance and position location are assessed. The primary emphasis is on determining the range errors associated with a single site locator by using the intercepted sky wave. Current errors in position locations are on the order of 20 km due to ionospheric variability, antenna size limitations, and data acquisition and processing problems. Improvements in position ...
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