The ionosphere (/aɪˈɒnəˌsfɪər/) is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, a region...

(HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized part of Earth's atmosphere. Work on the HAARP facility...

lightning discharges in the cavity formed by the Earth's surface and the ionosphere. The global electromagnetic resonance phenomenon is named after physicist...

telecommunications and radio science, an ionospheric sounding is a technique that provides real-time data on high-frequency ionospheric-dependent radio propagation...

The IPP or Ionospheric Pierce Point is the altitude in the ionosphere where electron density is greatest. These points can change based on factors like...

also known as the National Astronomy and Ionosphere Center (NAIC) and formerly known as the Arecibo Ionosphere Observatory, is an observatory in Barrio...

Ionospheric storms are storms which contain varying densities of energised electrons in the ionosphere as produced from the Sun. Ionospheric storms are...

An ionospheric heater, or an ionospheric HF pump facility, is a powerful radio wave transmitter with an array of antennas which is used for research of...

particular the ionosphere, and does not reach the surface. This absorption can temporarily increase the ionization of the ionosphere which may interfere...

propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere. Since it is not...

way of the ionosphere, the frequency at or below which a wave component is reflected by, and above which it penetrates through, an ionospheric layer. At...

Ionospheric Connection Explorer (ICON) was a satellite designed to investigate changes in the ionosphere of Earth, the dynamic region high in the atmosphere...

AM transmissions cannot be ionospheric propagated during the day due to strong absorption in the D-layer of the ionosphere. In a crowded channel environment...

Ionosphere Bay is a small bay bordering the east side of Cape Découverte, Antarctica. It was charted in 1951 by the French Antarctic Expedition and named...

the scattering of radio frequency or lower frequencies from the Earth's ionosphere, resulting in the ability to achieve greater distance radio broadcasting...

due to the conditions of the local ionosphere, the relevant sky waves are not reflected but penetrate the ionosphere. The skip zone is a natural phenomenon...

is the distance a radio wave travels, usually including a hop in the ionosphere. A skip distance is a distance on the Earth's surface between the two...

Earth–ionosphere waveguide is the phenomenon in which certain radio waves can propagate in the space between the ground and the boundary of the ionosphere....

Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a planned joint venture mission between the European Space Agency and the Chinese Academy...

shortwave frequencies (MF and HF bands), radio waves can refract from the ionosphere, a layer of charged particles (ions) high in the atmosphere. This means...

hydrogen is a minor atmospheric constituent. Whether Ganymede has an ionosphere associated with its atmosphere is unresolved. Ganymede's surface is composed...

propagate from their lightning source without major attenuation in the Earth–ionosphere waveguide, and can be received thousands of kilometres from their source...

the troposphere, stratosphere, mesosphere, thermosphere (formally the ionosphere) and exosphere. The study of Earth's atmosphere and its processes is called...

The TIMED (Thermosphere • Ionosphere • Mesosphere • Energetics and Dynamics) mission is dedicated to study the influences that energetics and dynamics...

The Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation of the Russian Academy of Sciences (IZMIRAN, ‹See Tfd›Russian: Институт...

The tiny ionospheric photometer (TIP) is a small space-based photometer that observes the Earth's ionosphere at 135.6 nm. The TIP instruments were designed...

Moon's orbit, ions should flow from the higher pressure region in the ionosphere out into space. The term "polar wind" was coined: 1937  in 1968 in a pair...

A sudden ionospheric disturbance (SID) is any one of several ionospheric perturbations, resulting from abnormally high ionization/plasma density in the...

from a layer of electrically charged atoms in the atmosphere called the Ionosphere. Therefore, short waves directed at an angle into the sky can be reflected...

the rarefied electrically charged layer of the atmosphere known as the ionosphere. STS-75 mission scientists hoped to deploy the tether to a distance of...