M.A. Akafyev – Post-graduate Student, Department «Electronic Instruments and Devices»,  Yuri Gagarin State Technical University of Saratov

E-mail: akaphevma@mail.ru

A.V. Melnikov – Ph. D. (Eng.), Main Designer, LCC «Geophysmash» (Saratov)

E-mail: mail@gfm.ru

A.A. Zakharov – Dr. Sc. (Eng.), Professor, Head of Department «Electronic Instruments and Devices»,  Yuri Gagarin State Technical University of Saratov

E-mail: zaharov@sstu.ru