V.M. Artyushenko1, V.I. Volovach2

1 Moscow State University of Geodesy and Cartography (Moscow, Russia)

2 Volga Region State University of Service (Toglyatti, Russia) 2 MIREA – Russian Technological University (Moscow, Russia)

1 artuschenko@mail.ru, 2, 3 volovach.vi@mail.ru