A.O. Pergushev – Assistant, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: pergushev.aleksey@mail.ru

V.A. Sorotsky – Dr.Sc.(Eng.), Professor, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: sorotsky@mail.spbstu.ru

A.M. Ulanov – Ph.D.(Eng.), Associate Professor, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: ulan-bator-1955@mail.ru