G.G. Vertogradov, M.S. Sklyarevsky THE INFLUENCE OF TID ON HF PROPAGATION CHARACTERISTICS AT CYPRUS ROSTOV-ON-DON PROPAGATION PATH OBTAINED BY LFM IONOSOUNDE DIRECTION FINDER IN 2013-2015 YEARS
G.G. Vertogradov, E.G. Chaika ACCURACY ESTIMATION OF SINGLE STATION LOCATION FOR THE DISTINCT WAYS OF SETTING THE IONOSPHERE CONDITION AT MID-LATITUDE PATHS