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ionospheric radio communications

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  • 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

  • Communications blackout — Not to be confused with radio silence or news blackout. In telecommunications, communications blackouts are a cessation of communications or communications capability, caused by a lack of power to a communications facility or to… …   Wikipedia

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

  • Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… …   Wikipedia

  • Sudden Ionospheric Disturbance — A sudden ionospheric disturbance (SID) is an abnormally high ionization/plasma density in the D region of the ionosphere caused by a solar flare. The SID results in a sudden increase in radio wave absorption that is most severe in the upper… …   Wikipedia

  • Herzogstand Radio Station — was a radio communication station, which was built and operated from 1920 to 1946 at Herzogstand in the proximity of Kochel/Lake in Bavaria. The plant was conceived of C Lorenz AG as independent operational funds for radio traffic on very long… …   Wikipedia

  • EME (communications) — Earth Moon Earth, also known as moon bounce, is a radio communications technique which relies on the propagation of radio waves from an earth based transmitter directed via reflection from the surface of the moon back to an earth based receiver.… …   Wikipedia

  • List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… …   Wikipedia

  • WSJT (Amateur radio software) — Infobox Software name = WSJT caption = developer = Joe Taylor, K1JT released = ? frequently updated = yes programming language = ? operating system = Cross platform language = ? genre = Amateur radio and DSP license = GPL status = active website …   Wikipedia

  • Meteor burst communications — Meteor scatter propagation as used by SNOTEL Meteor burst communications (MBC), also referred to as meteor scatter communications[1], is a radio propagation mode that exploits the ionized trails of meteors during atmospheric entry to establish… …   Wikipedia

  • Marine and mobile radio telephony — Example: Complete GMDSS A3 installation with HF telex. The Marine Radiotelephone Service or HF ship to shore operates on shortwave radio frequencies, using single sideband modulation. The usual method is that a ship calls a shore station, and the …   Wikipedia

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