- ionospheric layers
- ionosferische lagen
English-Dutch technical dictionary. 2013.
ionospheric layers
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Ionospheric absorption — (or ISAB) is the scientific name for absorption occurring as a result of the interaction between various types of electromagnetic waves and the free electrons in the ionosphere, which can interfere with radio transmissions.DescriptionIonosphere… … 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
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
Non-line-of-sight propagation — Non line of sight (NLOS) or near line of sight is a term used to describe radio transmission across a path that is partially obstructed, usually by a physical object in the innermost Fresnel zone. Many types of radio transmissions depend, to… … 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
F layer — Physics. the highest of the radio reflective ionospheric layers, beginning at an altitude of ab. 80 mi. (130 km) and consisting of two parts, the lower part (F1 layer) being detectable in the daytime only, the higher (F2 layer or Appleton layer)… … Universalium
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
ionosonde — /uy on euh sond /, n. a pulsed radar device used to measure the height of ionospheric layers. [1950 55; IONO + SONDE] * * * … Universalium
Appleton, Sir Edward Victor — ▪ British physicist born Sept. 6, 1892, Bradford, Yorkshire, Eng. died April 21, 1965, Edinburgh, Scot. British winner of the Nobel Prize for Physics in 1947 for his discovery of the so called Appleton layer of the ionosphere, which is a… … Universalium
night effect — The effect of changed polarization on a direction finder occurring at night. The effective range of a long range beacon that has a daytime range of 200 NM may be reduced to about 70 NM by night. This reduction in range occurs because of the… … Aviation dictionary
F layer — /ˈɛf leɪə/ (say ef layuh) noun the highest of the radio reflective ionospheric layers (about 130 km above the earth), consisting of a lower part detectable in the daytime only, and an upper part (Appleton layer) which, because it is constant, is… …
