01957oam 2200457I 450 991070514000332120140305150429.0(CKB)5470000002447958(OCoLC)727576043(EXLCZ)99547000000244795820110528d1960 ua 0engurmn|||||||||rdacontentrdamediardacarrierSupplementary world maps of F2 critical frequencies and maximum usable frequency factors /Donald H. ZacharisenWashington, D.C. :National Bureau of Standards, United States Department of Commerce, Office of Technical Services,1960.1 online resource (245 pages) chiefly illustrations, mapsNational Bureau of Standards technical note ;2-2Title from title screen (viewed Mar. 5, 2014)."Boulder Laboratories"--Cover."October 1960.""Prepared in response to Study program 60 and Recommendation 176 of the International Radio Consultative Committee (CCIR). This Technical Note supplements Technical Note 2 and together they present F2-layer prediction material for all months of the year."Includes bibliographical references (page 10).Ionospheric radio wave propagationCharts, diagrams, etcF regionCharts, diagrams, etcIonospheric radio wave propagationF regionZacharisen Donald H.1390637United States.National Bureau of Standards,Boulder Laboratories (U.S.),International Radio Consultative Committee,OCLCEOCLCEOCLCQGPOBOOK9910705140003321Supplementary world maps of F2 critical frequencies and maximum usable frequency factors3443619UNINA