sporadic-E ionization

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• Sporadic E propagation — Sporadic E or Es is an unusual form of radio propagation utilizing characteristics of the earth s ionosphere. Whereas most forms of sky wave propagation use the normal and cyclic ionization properties of the ionosphere s F region to refract (or… …   Wikipedia

• sporadic E — sporadic E, an area of high ionization in the E layer of the ionosphere which interferes with the normal reflection of short wave radio …   Useful english dictionary

• sporadic E layer — noun Date: 1949 a layer of ionization occurring irregularly within the E region of the ionosphere …   New Collegiate Dictionary

• sporadic e layer — noun Usage: usually capitalized E : a layer of ionization occurring irregularly within the E region of the ionosphere at heights of approximately 60 miles above the surface of the earth and occasionally being capable of reflecting radio waves of… …   Useful english dictionary

• Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …   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

• Meteoroid — A few shooting stars can be seen in this video from the ISS. A Perseid meteor (light streak somewhat to right of center of photo) and Milky Way. A meteoroid is a sand to …   Wikipedia

• TV and FM DX — TV DX and FM DX is the active search for distant radio or television stations received during unusual atmospheric conditions. The term DX is an old telegraphic term meaning long distance. VHF/UHF television and radio signals are normally limited… …   Wikipedia

• ionosphere and magnetosphere — ▪ atmospheric science Introduction       regions of Earth s (Earth) atmosphere in which the number of electrically charged particles ions (ion) and electrons (electron) are large enough to affect the propagation of radio waves (electromagnetic… …   Universalium

• 6-meter band — The 6 meter band is a portion of the VHF radio spectrum allocated to amateur radio use. Although located in the lower portion of the VHF band, it nonetheless occasionally displays propagation mechanisms characteristic of the HF bands. This… …   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