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 ?
The device allows the simulation of several complete gnss constellations simultaneously on multiple carrier frequencies and offers full control over the definition of the individual satellite orbits, User-specific whereabouts or movement patterns, Date and time as well as positional errors, Time errors, Multipath propagation, Ionospheric and tropospheric influences , Each scenario defined in this way can be repeated as often as required with exactly the same parameters.
Illustrating with ionospheric heating experiments he conducted during the past several decades, he shows how an understanding of plasma waves is key to preparing for and performing theoretical and experimental plasma research and for understanding the results.
We show the first unambiguous evidence of ionospheric bow waves as electron content disturbances over central/eastern United States, with AaAaAeAc1/4 1 h duration, 300 6 400 km wavelength and 280 m/s phase speed emanati from and tailing the totality region," they wrote in (http://onlinelibrary.
Understanding ionospheric activity is shedding light on how the Martian atmosphere is being lost to space, according to the team.
Though the charged particles are only a minority amongst the neutral ones, they nevertheless exert a great influence on the electrical properties of the medium, and it is their presence that brings about the possibility of radio communications over large distances by making use of one or more ionospheric reflections [2]
Since the ionospheric variations may be caused by many factors such as geomagnetic storm or solar flares etc, it is necessary to distinguish ionospheric anomalies associated with earthquakes if they occur during the same time period.
Photochemical processes control the behaviour of the two main ionospheric layers at Mars up to 170-200 km altitude (e.
Under certain conditions this can lead to a somewhat reduced availability of the service, mainly caused by ionospheric irregularities in certain regions of the world.
Researchers studied 14 years of global ionospheric data and discovered that the EEJ strengthens geomagnetically induced currents.
His research centred around ionospheric physics and radio propagation and his work saw him emigrate to Toronto, Canada, where he worked at the Department of Defence for three years.
Mercury's Day "Radar study of the planets has been an important activity of the Arecibo Ionospheric Observatory in Puerto Rico ever since its 1,000-foot radio-radar telescope went into operation in late 1963.
Some students [researchers] are making satellites looking at the ionospheric activities.