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.
- The ionosphere is the layer extending from about 80 km to the outer reaches of the atmosphere that includes charged particles.
- The ionosphere reflects neither FM radio nor broadcast television, itself a part of the radio spectrum.
- This results in a powerful electric field between the cloud tops and the ionosphere, the outer layer of Earth's atmosphere.
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.
- Fifteen minutes later, the ship slid into the planet's ionosphere.
- Jack monitored a video screen as the quartet of frigates entered the outer reaches of the planet's ionosphere.
- Example sentences
- Distance-dependent or spatially correlated errors due to ionospheric, tropospheric or satellite orbit effects can be more accurately modelled in a network approach.
- Although focussed on Canada in particular, those investigations would nevertheless shed light on northern ionospheric phenomena in general.
- The monitoring station in Poland is a key element, collecting ionospheric and Global Positioning System measurements information.
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