01693oam 2200433 a 450 991069710530332120230902162153.0(CKB)5470000002385864(OCoLC)227622225(EXLCZ)99547000000238586420080510d1971 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierA new method for predicting HF ground wave attenuation over inhomogeneous, irregular terrain[electronic resource] /R.H. OttBoulder, Colo. :U.S. Dept. of Commerce, Office of Telecommunications, Institute for Telecommunication Sciences,[1971]1 online resource (iv, 57 pages) illustrationsOT/ITS research report ;7Title from title screen (viewed on Dec. 20, 2010)."January 1971."Paper version no longer available for sale by the Supt. of Docs.Includes bibliographical references (pages 22-23).OT/ITS research report ;7.Radio wavesAttenuationMathematical modelsRadio wave propagationMathematical modelsRadio wavesAttenuationMathematical models.Radio wave propagationMathematical models.Ott R. H1397097Institute for Telecommunication Sciences.DTICEDTICEOCLCQGPOBOOK9910697105303321A new method for predicting HF ground wave attenuation over inhomogeneous, irregular terrain3467349UNINA