adverb see ionosphere

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • ionosphere — noun Date: 1926 the part of the earth s atmosphere in which ionization of atmospheric gases affects the propagation of radio waves, which extends from about 30 miles (50 kilometers) to the exosphere, and which is contiguous with the upper portion …   New Collegiate Dictionary

  • Radio broadcasting — Long wave radio broadcasting station, Motala, Sweden …   Wikipedia

  • Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …   Wikipedia

  • ionosphere — noun a) The part of the Earths atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more. b) The similar region of the atmosphere of another planet. See Also: ionospheric,… …   Wiktionary

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