1) Bouncer of radio signals 2) Outer region 3) Part 4) Part of space 5) Radio wave reflector 6) Region 7) Region of air above the earth 8) Regions of space 9) Where the d layer is
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https://www.crosswordclues.com/clue/ionosphere
A layer of atmosphere composed largely of ions, that reflects radio waves.
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http://jot101.com/2015/05/a-z-of-science-fiction-words/
An atmospheric layer with a high concentration of ions and free electrons.
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http://planetfacts.org/space-terms/
A region of the upper atmosphere that reflects some radio waves.
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http://www.bbc.co.uk/weather/weatherwise/glossary/i.shtml
An atmospheric layer dominated by charged, or ionized, atoms that extend from about 38 to 400 miles above the Earth's surface.
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http://www.braeunig.us/space/glossary.htm
(from the article `ionosphere and magnetosphere`) IonosphereThe portion of the thermosphere where charged particles (ions) are abundant is called the ionosphere. These ions result from the removal of electrons ... ...through the overlying layer known as the thermosphere. Also above about 80–90 km there is an increasing fraction of ...
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http://www.britannica.com/eb/a-z/i/37
The part of the atmosphere that is kept partially (up to 0.1%) ionized by ultraviolet light and X-rays from the Sun. It lies immediately above the stratosphere, roughly between altitudes 50 and 500 km, and is divided into three main layers, D, E, and F, on the basis of radio wave propagation propert...
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http://www.daviddarling.info/encyclopedia/I/ionosphere.html
that part of the upper atmosphere characterized by the presence of ions and free electrons mainly arising from photo-ionization, the electron density being sufficient to produce significant modification of the propagation of radio waves in certain frequency bands NOTE - The Earth's ionosphere extends approximately from a height of 50 km to a height...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=705-06-11
Rarefied, ionized region of the Earth's atmosphere, between approximately 60 and 400 km.
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http://www.encyclo.co.uk/local/20130
the upper layer of the air where some of the gas molecules have been ionized by high energy radiation or atomic particles from the Sun. Older forms of radio communication depended on its presence for transmission beyond the horizon.
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http://www.encyclo.co.uk/local/20842
<radiobiology> Ionised region of the upper earth atmosphere, which behaves like a plasma, including reflection of AM radio waves and generation of auroral glows. ... (09 Oct 1997) ...
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http://www.encyclo.co.uk/local/20973
Also known as the thermosphere. A layer in the atmosphere above the mesosphere extending from about 80km above the Earth's surface. It can be considered a distinct layer due to a rise in air temperature with increasing height. Atmospheric densities here are very low.
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http://www.encyclo.co.uk/local/22268
The region of the earth's upper atmosphere containing a small percentage of free electrons and ions produced by photoioniza- tion of the constituents of the atmosphere by solar ultraviolet radiation at very short wavelengths (
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http://www.encyclo.co.uk/visitor-contributions.php
A region in the atmosphere above 50 kilometers from the surface where relatively large concentrations of ions and free electrons exist. The ionosphere is important for human communications because it re-directs AM radio transmissions. This process extends the distance that radio transmissions can travel.
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http://www.physicalgeography.net/physgeoglos/i.html
The ionosphere is the ionised layer of the earth's atmosphere. It extends over altitudes from about 50 km to about 600 km.
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http://www.probertencyclopaedia.com/browse/GI.HTM
A region of charged particles in a planet's upper atmosphere. In Earth's atmosphere, the ionosphere begins at an altitude of about 25 miles and extends outward about 250.
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http://www.seasky.org/astronomy/astronomy-glossary.html
A region of charged particles in a planet's upper atmosphere; the part of the earth's atmosphere beginning at an altitude of about 400 kilometers (25 miles) and extending outward 400 kilometers (250 miles) or more.
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http://www.solarviews.com/eng/terms.htm
[
n] - the outer region of the Earth`s atmosphere
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http://www.webdictionary.co.uk/definition.php?query=ionosphere
The region of the Earth's upper atmosphere containing a small percentage of free electrons and ions produced by photoionization of the constituents of the atmosphere by solar ultraviolet radiation. The ionosphere significantly influences radiowave propagation of frequencies less than about 30 MHz.
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https://www.encyclo.co.uk/local/20087
The region of the Earth's upper atmosphere containing a small percentageof free electrons and ions produced by photo ionization of the constituentsof the atmosphere by solar ultraviolet radiation at very short wavelengths(less than 1000 angstroms). The ionosphere significantly influences radio wavepropagation of frequencies less than about 30 MHz. ...
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https://www.encyclo.co.uk/local/20687
noun the outer region of the Earth`s atmosphere; contains a high concentration of free electrons
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https://www.encyclo.co.uk/local/20974
Ionized layer of Earth's outer atmosphere (60–1,000 km/38–620 mi) that contains sufficient free electrons to modify the way in which radio waves are propagated, for instance by reflecting them back to Earth. The ionosphere is thought to be produced by absorption of the Sun's ultraviolet radiation. The British Antarctic Survey ...
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https://www.encyclo.co.uk/local/21221
A region of the Earth's atmosphere.
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https://www.encyclo.co.uk/local/22784
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.
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https://www.infoplease.com/dictionary/ionosphere
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