01338cam0-22003371i-450-99000048261040332120090223112204.092-835-0224-8000048261FED01000048261(Aleph)000048261FED0100004826120020821d1978----km-y0itay50------baenga-------101yyOperational modelling of the aerospace propagation environmentpapers presented at a meeting of the Electromagnetic Wave Propagation Panel, held in Ottawa, Canada, 24-28 April, 1978North atlantic treaty organization advisory group for aerospace research and developmentedited by H. SoicherNeuilly sur seine, FranceAGARD19782 v.ill.30 cmAGARD conference proceedings238Onde elettromagneticheCongressiPropagazione ionosferica delle onde radio621.384'11North Atlantic Treaty Organization.Advisory Group for Aerospace Research and DevelopmentElectromagnetic wave propagation panel<1978 ;Ottawa, Canada>ITUNINARICAUNIMARCBK99000048261040332110 PRO 251/110285DINEL10 PRO 251/210286DINELDINELUNINA