A.A. Averin1, V.V. Antipov2, D.S. Gorkin3, V.V. Kopeikin4, D.A. Smirnov5, A.A. Pivtorak6, V.I. Sakhterov7

1–5,7 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS (Moscow, Russia)

6 Deep GPR Research (Saint Petersburg, Russia)

7 LLC "RL Radar in geophysics and radiophysics" (Moscow, Russia)

3 gorkin@izmiran.ru, 6 info@deep-gpr.com, 7 sakhterov@mail.ru