Y.V. Gridnev - Ph.D. (Eng.), Leading Research Scientist, Physical-Technical Institute of National Academy of Sciences of Belarus Y.F. Yatsyna - Ph.D. (Eng.), Director of Scientific and Production Center, Physical-Technical Institute of National Academy of Sciences of Belarus S.A. Rak - Research Scientist, Physical-Technical Institute of National Academy of Sciences of Belarus A.G. Ivanov - Research Scientist, Physical-Technical Institute of National Academy of Sciences of Belarus. E-mail: maks.uav@gmail.com