Definition of ionosphere in English:

ionosphere

noun

  • 1The layer of the earth's atmosphere that contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 50 to 600 miles (80 to 1,000 km) above the earth's surface.

    • ‘Errors in satellite to receiver distances can creep in if conditions within the ionosphere, the electrically charged outer layer of the atmosphere, slow down the signal.’
    • ‘The flow of electric currents in the ionosphere decreased and offset the strength of Earth's magnetic field (as detected on Earth's surface) by more than 10 percent.’
    • ‘Later it became apparent what was happening, the signals were going up to the ionosphere and being bounced down to earth but they didn't know anything about that in 1898.’
    • ‘The burst of gamma rays and X-rays even disturbed the Earth's ionosphere, causing a sudden disruption in some radio communications.’
    • ‘The X rays from the flare bombarded the Earth's atmosphere almost instantly, cooking the ionosphere and producing a surge of electric currents.’
    • ‘Only signals in the HF frequency band can be used since the ionosphere will not reflect signals at higher frequencies.’
    • ‘There's always sand in the cogs somewhere, even if these days its the ionosphere, or the troposphere, where things get gritty.’
    • ‘In 1931 he gave the Royal Society Bakerian lecture which was a classic in which he developed the now standard layer theory for the lower ionosphere.’
    • ‘Other satellites had communications problems when the excited ionosphere interfered with radio signals sent to and from the ground.’
    • ‘A major role of the atmosphere was to filter out the ionising radiation from the sun by ionising the high atmosphere and forming the ionosphere.’
    • ‘This radiation also generates more charged particles in the ionosphere, affecting the reflection and transmission paths of radio frequencies used by satellites and ground-based communications.’
    • ‘They also receive small doses from the radiation that is naturally trapped around Earth in the ionosphere and the Van Allen radiation belts, particularly near the South Atlantic Anomaly.’
    • ‘The ionosphere is the layer extending from about 80 km to the outer reaches of the atmosphere that includes charged particles.’
    • ‘The circuit closes when the particles reaches the ionosphere, the outer layer of the earth's atmosphere.’
    • ‘This results in a powerful electric field between the cloud tops and the ionosphere, the outer layer of Earth's atmosphere.’
    • ‘The ionosphere reflects neither FM radio nor broadcast television, itself a part of the radio spectrum.’
    • ‘It harnesses an FM station's signals to study particles in the ionosphere - the top layer of the atmosphere, over 300 miles up.’
    • ‘Its receiver picked up any reflections from the ionosphere and displayed the results on an oscilloscope.’
    • ‘The clouds will allow scientists to view winds in a high and poorly accessible layer of Earth's atmosphere called the ionosphere.’
    • ‘The electric field that exists between cloud top and ionosphere speeds up free electrons bopping about in the neighborhood.’
    1. 1.1A region similar to an ionosphere above the surface of another planet.
      • ‘The Columbia's port side plasma cannons, which had been quiet through most of the engagement, opened up against the two alien vessels heading for the planet's ionosphere.’
      • ‘Low-frequency short-wave radio would work over longer distances on Mars because it has an ionosphere to reflect the radio waves beyond the horizon.’
      • ‘Its major goals are to characterise the subsurface layers of sediments and possibly detect underground water or ice, to conduct large-scale altimetry mapping and provide data on the planet's ionosphere.’
      • ‘In addition, MARSIS will conduct large-scale altimetry mapping and provide data on the planet's ionosphere, as this electrically charged region of the upper atmosphere reflects radio waves too.’
      • ‘Jack monitored a video screen as the quartet of frigates entered the outer reaches of the planet's ionosphere.’
      • ‘Typically the satellite clocks, orbits, and ionosphere are modeled separately, and values of parameters describing these corrections are transmitted to users within the area of coverage.’
      • ‘Third, Titan is unique among moons in the Solar System for its thick atmosphere, which is complete with an ionosphere - an outer layer of ionized atoms that readily interact with magnetic fields.’
      • ‘Fifteen minutes later, the ship slid into the planet's ionosphere.’

Pronunciation:

ionosphere

/īˈänəˌsfir/