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ionospheric radio communication

См. также в других словарях:

  • 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

  • Radio waves — are electromagnetic waves occurring on the radio frequency portion of the electromagnetic spectrum. A common use is to transport information through the atmosphere or outer space without wires. Radio waves are distinguished from other kinds of… …   Wikipedia

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

  • Radio horizon — In telecommunication, radio horizon is the locus of points at which direct rays from an antenna are tangential to the surface of the Earth. If the Earth were a perfect sphere and there were no atmospheric anomalies, the radio horizon would be a… …   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

  • 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

  • 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

  • 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

  • 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

  • Flutter (electronics and communication) — In the field of electronics and communication, flutter is the rapid variation of signal parameters, such as amplitude, phase, and frequency. Examples of electronic flutter are:*Rapid variations in received signal levels, such as variations that… …   Wikipedia

  • Amateur radio frequency allocations — Amateur radio frequency allocation is done by national telecommunications authorities. Globally, the ITU oversees how much radio spectrum is set aside for amateur radio transmissions. Radio amateurs use a variety of transmission modes, including… …   Wikipedia

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