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Crossword clues for ionosphere

Longman Dictionary of Contemporary English
▪ High in the thermosphere lies the ionosphere, where the dominant ion is H +.
▪ In terms of radio propagation, varying electrical conductance in the ionosphere influences either the absorbency or reluctance of radio emissions.
▪ It attempts to modify the electric currents in the ionosphere during a display of the lights and to observe the results.
▪ Project waterhole has reinforced earlier theories that electric currents in the ionosphere cause the strange phenomenon of the Northern Lights.
▪ Surface magnetization or an ionosphere can also provide a magnetosphere.
▪ These high frequency radio programmes can be bounced off the ionosphere which at certain high frequencies acts like an electrically charged mirror.
▪ These studies help us to understand the coupling between magnetosphere and ionosphere, and complex natural phenomena such as the aurora.
▪ This also produces most of the ions in the Cytherean ionosphere.
The Collaborative International Dictionary

ionosphere \ionosphere\ n. the outer region of the earth's atmosphere, beyond which is the exosphere; it contains a high concentration of free electrons and ions, and extends from about 50 miles to about 250 miles above the earth's surface, but the height shows daily and seasonal variation, and the composition of the particles in the ionosphere is also affected by events such as solar flares.

Douglas Harper's Etymology Dictionary

1926, from ion + sphere. Coined by Scottish radar pioneer Robert A. Watson-Watt (1892-1973). So called because it contains many ions.


n. 1 The part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more. 2 The similar region of the atmosphere of another planet.


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


The ionosphere is a region of Earth's upper atmosphere, from about to altitude, and includes the thermosphere and parts of the mesosphere and exosphere. It is ionized by solar radiation, plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical importance because, among other functions, it influences radio propagation to distant places on the Earth.

Usage examples of "ionosphere".

He was sundered and spread, and thought and voice were no longer his, but gathered from worldwide as if by the overhead warping of the ionosphere, or from some medullar sentience of Earth itself, the whole sphere resonating from brainstem of the Brooks range to caude of Tierra del Fuego.

If one studies the intrinsic resonance of the coaxially based spherical cavity caused by the boundaries of the ionosphere and the surface of the planet, one finds that it matches certain properties of brain waves!

Further within this energy envelope are layers of tenuous matter called the atmospheric strata: exosphere, ionosphere, mesosphere, stratosphere, and troposphere.

When they had been lured down to the fringes of the ionosphere, icy gusts of hydrogen molecules burnt around them, emitting banners of spectral flame.

Other officers told of detection methods used to judge the size and position of explosions, and how they intended to jam the Russian detection devices like the radar that detects changes in the electric charges in the ionosphere, and the recording barometers that record air and sound waves and produce microbarographs, and the radio signals that are picked up from the release of radio energy at the time of the explosion.

The Primes were fighting back, sending up flyers and big ships, their beam weapons punching through the scuzzy continent-wide clouds to intercept the rain of lethal machines as they sank down through the ionosphere.

Because high-frequency signals bounce between the earth and the ionosphere, the right equipment can pick them up thousands of miles away.

A most intricate device would be placed atop a sounding rocket, complete with a score of telemetric devices, and it would soar the first five miles through the visible cloud layer, through the stratosphere and mesosphere, reporting perfectly on conditions there, but when it entered the ionosphere, where the data became critical, some small component of the instrument system, damaged by the physical stress of launch, would cease functioning and the shot would be scrubbed.

The molecules of water vapor in the clouds might allow the heavy charge accumulated in the ionosphere to leak off gradually during the long descent, avoiding any lightninglike arcing from the Thrust-tubes .

From within the perimeter, a succession of Boeings, Lockheeds, and Douglases sailed vertically upward on the first stages of their suborbital trajectories through the ionosphere.

He spoke with unnecessary elaboration to the face in the phone-plate, and grudgingly went through the process by which Bordman measured the successive drops in voltage with power drawn from the ionosphere.

He is now certain that those echoes were produced in a way similar to that of others reported in recent years which can be attributed to natural disturbances in the ionosphere (the outer layers of Earth's atmosphere).

Anshun had few sensors left in working order, but the aerobots provided intermittent sweeps of space directly above the tempestuous ionosphere.

As you may know, sun-spots, or, rather, the emission of solar particles from these sun-spots, are directly responsible for the formation of the aurora borealis and magnetic storms, both of these being related to disturbances in the ionosphere.

They had the minimum installations which could draw on their planets' ionospheres for power, and they were not expected to handle anything bigger than a twenty-ton lifeboat.