TY JOUR TI THE METHOD OF CALCULATION OF ENERGY PARAMETERS OF THE RADIO LINK BETWEEN UNMANNED AIRCRAFT AND GROUND CONTROL STATION OF EMERCOM OF RUSSIA KW unmanned aircraft KW retransmission of radio signals KW ground station management of EMERCOM of Russia KW refraction KW energy parameters of the radio link JO Problems of risk management in the technosphere AU Gorbunov, A.A. AU Dmitriev, V.I. AU Galimov, A.F. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia