ionosphere ionosphere  /a� ˈ�jɑ nəs fir/


  • (n) the outer region of the Earth's atmosphere; contains a high concentration of free electrons


  1. The heights of the ionosphere shells change from hour to hour, from day to day.
  2. In daytime the signal reflects strongly from the ionosphere, but at night the ionosphere is less effective, so the signal gets much weaker.
  3. Like scaled stones skittering atop a lake, radio and TV signals ricochet from the electrically charged ionosphere.


  1. The Space Alphabet: A Trippy, Orchestral Tribute to Celestial ... Stuff

    This kids' album from 1972 could teach you a thing or two about water vapor, the ionosphere, and Uranus.        
    on June 22, 2013     Source: The Atlantic

  2. NASA Using Sounding Rockets To Study Our Ionosphere

    Brett Smith for - Your Universe Online Way up in the Earth’s atmosphere is a layer of charged particles called the ionosphere , which plays a crucial role in the transmission of radio and other signals. Through a mission called Dynamo, NASA scientists are planning to study the currents that pass through this charged section of the atmosphere found between 30 and 600 miles above ...
    on June 22, 2013     Source: redOrbit

  3. Sounding rocket to observe currents in atmosphere

    ( NASA/Goddard Space Flight Center ) Scientists are gearing up to launch a sounding rocket from NASA's Wallops Flight Facility, Wallops Island, Va. for a five-minute trip to study a global, electrical current called the dynamo sweeping through the ionosphere. The sounding rocket is also called Dynamo. The window for launch is June 24 to July 8, 2013 (excepting June 26-27).
    on June 21, 2013     Source: EurekAlert!

Wiki Images for ionosphere

definition of ionosphere


  • Fybush explains: "It's a phenomenon that happens primarily in the summer months, when a layer of the ionosphere becomes ionized in such a way that it functions as a mirror at certain frequencies, including at times the FM radio dial."
    on Aug 2, 2009 By: Scott Fybush Source: The Daily News Online

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