А.А. Volkov – Ph.D. (Eng.), Lecturer, Military Educational-Research Centre of Air Force «Air Force Academy Named After Professor N.E. Zhukovsky and Y.A. Gagarin» (Voronezh) E-mail: volkov_aa@autorambler.ru

Justification of approximation of distribution functions of probabilities of levels of electromagnetic defeat of semiconductor devices and radioelectronic tools is given by logarithmic normal curves. Compliance of approximating functions to results of an experiment is shown. Calculation of probability of electromagnetic defeat of radioelectronic means with a nominal receiving path at the uniform distribution of the directions of reception of the striking radiation is carried out. 

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