Korobkov M.A. - Post-gradient Student, Ryazan State Engineering University, Research Engineer, PC Branch «JRSC» - «RI SIE» (Moscow). E-mail: Korobkov.M.A@yandex.ru Petrov A.S. - Dr.Sc. (Eng.), Professor, NIU VShE MIEM, Chief Research Scientist, PC Branch «JRSC» - «RI SIE» (Moscow). E-mail: as-petr@yandex.ru

A.V. Nemov1

1 Russian Institute of Radionavigation and Time (Saint-Petersburg, Russia)