M.I. Sychev - Dr.Sc. (Eng.), Senior Research Scientist, Head of Department of the Radiolocation and Radionavigation Systems, Moscow Aviation Institute (National Research University). E-mail: sychev@mai.ru S.V. Fesenko - Deputy Director, Branch «Aeronautical Research Institute» State Research Institute of Civil Aviation Moscow. E-mail: fesenko@atminst.ru