А.I. Agarughev– Dr.Sc. (Phys.-Math.), Professor, Irkutsk National Research Technical University
E-mail: aai.irk@mail.ru

Nguyen Minh Giang – Le Quy Don Technical university (Viet Nam)
E-mail: nmgiang44@gmail.com

А method and an algorithm for predicting angular characteristics of decameter radio waves are presented in the paper. A method for taking into account the scattering of radio ways in the ionosphere is presented in the paper. Calculation results of arrival angles of radio waves compared with experimental data. An example using calculating results of arrival angles of radio ways to solve the problem of optimizing radiation patterns of decameter radio waves antennas is given.

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