[ī-ŏńə-sfîŕ]
(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.
Dictionary.com · The American Heritage® Dictionary
The Ionosphere Explained: ... Why is the Ionosphere important? ... What does the ionosphere have to do with the aurora?
www.uaf.edu/asgp/hex/ionosphere.htm www.uaf.edu/asgp/hex/ionosphere.htm
What is the Ionosphere? ... How is the Ionosphere Formed? ... The existence of charged particles at this altitude and above, signals the beginning of the ionosphere a region having the properties of a gas and of a plasma. The ionosphere is indicated by the light green shading in the figure to the left.
www.haarp.alaska.edu/haarp/ion1.html
Index of Information About the Ionosphere ... Research conducted by the High Frequency Active Auroral Research Program uses interactive probing techniques to study the physics of the ionosphere. ... What protection does the Ionosphere provide?
www.haarp.alaska.edu/haarp/ionindex.html
Ionosphere - Wikipedia, the free encyclopedia
The ionosphere is the uppermost part of the atmosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the ...
en.wikipedia.org/wiki/Ionosphere
Radio telescope observator ... The Mission of NAIC ... The NAIC enables research in the areas of astronomy, planetary studies, and space and atmospheric sciences by providing unique capabilities and state-of-the-art instrumentation for data collection and analysis, together with logistical support to users.
www.naic.edu/
Because of the Sun 's UV radiation, Earth 's upper atmosphere is partly (0.1% or less) ionized plasma at altitudes of 70-1500 km. This region, ionosphere, is coupled to both the magnetosphere and the neutral atmosphere.
www.oulu.fi/~spaceweb/textbook/ionosphere.html www.oulu.fi/~spaceweb/textbook/ionosphere.html
The earth's ionosphere ... Production of the ionosphere ... Shorter wavelength radio signals pass through the ionosphere but are affected by it. These shorter wavelengths are used by satellites for imaging the earth, and the ionosphere affects the images rather like the way the atmosphere causes "twinkling" of the stars.
ion.le.ac.uk/ionosphere/ionosphere.html ion.le.ac.uk/ionosphere/ionosphere.html
Describes the composition and layers of the atmosphere. ... The Mesosphere and Ionosphere ... The ionosphere is very thin, but it is where aurora take place, and is also responsible for absorbing the most energetic photons from the Sun, and for reflecting radio waves, thereby making long-distance radio communication possible.
csep10.phys.utk.edu/astr161/lect/earth/atmosphere.html