ionosphere

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i·on·o·sphere

 (ī-ŏn′ə-sfîr′)
n.
A region of the earth's atmosphere where ionization caused by incoming solar radiation affects the transmission of radio waves. It extends from a height of 70 kilometers (43 miles) to 400 kilometers (250 miles) above the surface.

i·on′o·spher′ic (-sfîr′ĭk, -sfĕr′-) adj.

ionosphere

(aɪˈɒnəˌsfɪə)
n
(Astronomy) a region of the earth's atmosphere, extending from about 60 kilometres to 1000 km above the earth's surface, in which there is a high concentration of free electrons formed as a result of ionizing radiation entering the atmosphere from space. See also D region, E region, F region
ionospheric adj

i•on•o•sphere

(aɪˈɒn əˌsfɪər)

n.
the region of the earth's atmosphere between the stratosphere and the exosphere, consisting of several ionized layers and extending from about 50 to 250 mi. (80 to 400 km) above the surface of the earth.
i•on`o•spher′ic (-ˈsfɛr ɪk) adj.

i·on·o·sphere

(ī-ŏn′ə-sfîr′)
A region of the Earth's atmosphere in which atoms are often ionized (electrically charged) by radiation from the sun. The ionosphere lies mostly in the lower thermosphere, from about 43 to 250 miles (69 to 402.5 kilometers) above the Earth. Radio waves, which normally travel in a straight line, can be transmitted long distances over the curved surface of the Earth because they bounce off certain layers of the ionosphere and return to Earth instead of continuing into space.

ionosphere

That part of the atmosphere, extending from about 70 to 500 kilometers, in which ions and free electrons exist in sufficient quantities to reflect electromagnetic waves.

ionosphere

the outermost part of the earth’s permanent atmosphere, beyond the stratosphere, composed of heavily ionized molecules. It extends from about 50 to 250 miles above the surface of the earth. Cf. exosphere.
See also: Atmosphere

ionosphere

1. The upper layer of the atmosphere that lies above the stratosphere and is about 217 mi (350km) thick.
2. The area of the Earth’s atmosphere in which ionization caused by solar radiation affects the transmission of radio waves.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons
atmosphere, air - the mass of air surrounding the Earth; "there was great heat as the comet entered the atmosphere"; "it was exposed to the air"
D region, D-layer - the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves
Appleton layer, F layer, F region - the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
E layer, E region, Heaviside layer, Kennelly-Heaviside layer - a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
region, part - the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space"
Translations
ionosfääri

ionosphere

[aɪˈɒnəsfɪəʳ] Nionosfera f

ionosphere

nIonosphäre f

ionosphere

[aɪˈɒnəˌsfɪəʳ] nionosfera
References in periodicals archive ?
A software package for computing double differenced ionospheric delay according (3) has been developed as a Ph.D.
Finally, for specific ionospheric conditions, propagation parameters, etc., the US Federal Communication Commission (FCC] has a web site with loads of data (www.fcc.gov).
Berkner (1905-1967) began his research career with the study of ionospheric conditions surrounding the transmission of radio signals, which he undertook during the period he served as a radio engineer with Byrd's 1928-1930 Antarctic expedition.
"The DTSR-100 receiver is primarily aimed at the ionospheric research community worldwide, and a number of research institutions have expressed an interest, " he said.
DTL director Clive Willson, who also heads the electronic workshop at the university's physics department, said: "The DTSR-100 receiver is primarily aimed at the ionospheric research community worldwide, and a number of research institutions have expressed an interest.
VHF low band is also susceptible to noise and ionospheric propagation.
Perkins, who is on long-term assignment at General Atomics' DIII-D tokamak in San Diego, was recognized for his outstanding contributions in many critical areas of plasma physics research with applications in fusion, basic plasma physics experiments and ionospheric physics.
A long history of ionospheric research, however, preceded the start-up of the HAARP project.
Furthermore we demonstrate how we use this procedure to locate the ionospheric polar cap boundary.
By measuring the time it took the radar signal to return to Earth, the researchers could track changes in the height of the ionospheric layer within the thermosphere.
As these ionospheric currents flow around the earth, they generate a response within the planet itself.