Ionosphere

Ionosphere A weakly ionized region of the 's atmosphere which conducts electricity. The ionosphere lies at the base of the above the 60-km altitude, and reflects radio frequencies below about 30 MHz.

Ionosphere Constituents The various regions of the ionosphere have higher concentrations of charged particles (ions) than do other parts of the thermosphere, which consists mostly of electrically neutral atoms and molecules.

Ionosphere (Earth's) Introduction 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.

The ionosphere is the uppermost part of the atmosphere Earth's atmosphere ...

Definition: ionosphere: A region of charged particles in a planet's upper atmosphere; the part of the Earth's atmosphere beginning at an altitude of about 25 miles and extending outward 250 miles or more.

IONOSPHERE The ionosphere is one of the highest layer of the Earth's atmosphere. The ionosphere starts at about 43-50 miles (70-80 km) high and continues for hundreds of miles (about 400 miles = 640 km).

ionosphere Radio Astronomy We CAN walk through walls since we're only 0.01% substance ...

ionosphere the highest but one layer of a Gaian Type planet's atmosphere, part of the thermosphere, and located between the mesosphere and the exosphere. It typically starts at about 60-100 km and continues for several hundred kilometers.

ionosphere The part of the Earth's atmosphere above about 50 km where the atoms are significantly ionized and affect the propagation of radio waves.

Ionosphere A region of the Earth's upper atmosphere where solar radiation ionizes the air molecules. This region affects the transmission of radio waves and extends from 50 to 400 kilometers (30 to 250 miles) above the Earth's surface.

ionosphere - (n.) The zone of the earth's upper atmosphere, between 80- and 500-km altitude, where charged subatomic particles (chiefly protons and electrons) are trapped by the earth's magnetic field. ~ See Also: Van Allen belts.

Ionosphere A region of charged particles in a planet's upper atmosphere. In Earth's atmosphere, the ionosphere begins at an altitude of about 25 miles and extends outward about 250.

Ionosphere: The outer layers of the Earth's atmosphere (above 50 miles from the surface of the Earth), where many of the gas atoms are ionized by high-energy extraterrestrial radiation.

Ionosphere--a region covering the highest layers in the Earth´s atmosphere, containing an appreciable population of ions and free electrons. The ions are created by sunlight ranging from the ultra-violet to x-rays.

Ionosphere. The region of the Earth's atmosphere that lies above the stratosphere and below the exosphere.

Ionosphere (a) The region of Earth's atmosphere (80-500 km), immediately above the stratosphere. The ionosphere consists of the D layer, the E layer, and the F layers (q.v.). It is strongest at the end of the day.

Ionosphere - The lower part of the thermosphere of a planet in which many atoms have been ionized by ultraviolet solar photons Iron Meteorite - A meteorite composed primarily of iron and nickel ...

Because the ionosphere is an ohmic conductor of sorts, such flow will heat it up.

On earth the ionosphere is isolated from the solar wind by the magnetosphere. Venus lacks a magnetic field of its own, but the solar wind seems to generate an induced magnetosphere, probably by a dynamo action involving its own magnetic field.

A glow in the ionosphere of a planet or moon caused by the interaction between the object's magnetic field and charged particles from the Sun; "aurora" is Latin for "dawn.

Region of the ionosphere above the F layers. [H76] F-Spot see Sunspots [H76] F Star ...

Charge neutrality is then restored by electrons drawn upwards as the downward region 2 current, and electrons dumped into the ionosphere (plus some ions drawn up) to create the corresponding upward currents.

magnetic crotchet A sudden change in the earth's magnetic field due to an increase in the conductivity of the lower ionosphere. See sudden ionospheric disturbance. magnetic current sheath See plasma sheath.

A daytime layer of the earth's IONOSPHERE approximately 50 to 90 km in altitude. DARK SURGE ON DISK (DSD). Dark gaseous ejections visible in H-ALPHA. DIFFERENTIAL ROTATION. The change in SOLAR ROTATION RATE with latitude.

aurora (Latin for "dawn") a glow in a planet's ionosphere caused by the interaction between the planet's magnetic field and charged particles from the Sun aurora borealis the "Northern Lights"; caused by the interaction between the solar wind, ...

"From the ionosphere to high energy astronomy - a personal experience". The Century of Space Science. Springer. ISBN 0792371968. ^ a b Liu, C. Z.; Li, T. P. (1999). "X-Ray Spectral Variability in Cygnus X-1".

Ionosphere The region of the Earth's upper atmosphere containing a small percentage of free electrons and ions produced by photoionization of the constituents of the atmosphere by solar ultraviolet radiation.

Another effect is that the shorter radio waves act more like light, travelling in straight lines that are not reflected back towards the Earth by the ionosphere, resulting in a shorter effective reception range.

In 1957 the Swedish physicist Hannes Alfven predicted the draping of the magnetic lines of the solar wind around the cometary ionosphere. This phenomenon was detected by the International Cometary Explorer spacecraft, launched by the U.S.

The magnetospheric plasma has an abundance of electrons: some are magnetically trapped, some reside in the magnetotail, and some exist in the upward extension of the ionosphere, which may extend (with diminishing density) some 25, ...

The Uranian thermosphere, together with the upper part of the stratosphere, corresponds to the ionosphere of Uranus. Observations show that the ionosphere occupies altitudes from 2,000 to 10,000 km.

The primary affect on the Earth is on our ionosphere. This is the very upper part of the . Increased sunspot activity frequently accompanies an increase in the outflow of from the sun in the form of a "solar wind".

Sunspot activity on the Sun charges up our Earth's Ionosphere. The charged Ionosphere lets radio waves bounce more effectively back to Earth, and improves long distance radio coverage (especially in the shortwave radio bands).

The mesosphere is the atmospheric layer between the stratosphere and the ionosphere. The mesosphere is characterized by temperatures that quickly decrease as height increases.

It is an important indicator of solar activity because it tends to follow the changes in the solar ultraviolet that influence the Earth's upper atmosphere and ionosphere. Many models of the upper atmosphere use the 10.

By monitoring the radio signals during the spacecraft occultation, scientists discovered that Io had a high concentration of electrons close to its surface indicating that it had an ionosphere.

as seen from the Earth, rotates about its axis once in just over 27 days and its activity rises and falls over an approximately 11 year cycle, producing variations in the Earth's magnetic field and changes in our upper atmosphere (the ionosphere) ...

A bow shock is a supersonic shock wave that is formed as the interacts with the outermost layer of a planet's (or a highly conducting ionosphere).

The aurora takes place when the solar wind collides with the Earth's ionosphere. Atmospheric particles become excited during the collision and release energy. This energy is seen by us as bursts of colored lights in the sky.

stratosphere -- An upper portion of a planetary atmosphere, above the troposphere and below the ionosphere, characterized by relatively uniform temperature and horizontal winds.

Structure and layers of an atmosphere Planetary: Troposphere • Stratosphere • Thermosphere • Exosphere Ozone layer • Ionosphere • Magnetosphere Solar: Photosphere • Chromosphere • Corona ...

If the pulse is strong enough, it energizes ions at the border of the stratosphere and ionosphere and causes them to glow as the leading edge of the pulse expands in a spherical fashion.

The 1000-foot (305-meter) dish at the Arecibo radio telescope on Puerto Rico is the largest in the world. (National Astronomy and Ionosphere Center/Arecibo Observatory) ...

The National Science Foundation (NSF) has renewed the management contract of Arecibo with Cornell's National Astronomy and Ionosphere Center (NAIC) for approximately 70 million dollars through March 31, 2010.

Its primary objectives were to investigate the solar wind in the Venusian environment, use radar imaging to map Venus' surface and study the characteristics of the Venusian upper atmosphere and ionosphere.

See also: Earth, Solar, Atmosphere, Field, Sun