ionospheric layer
31TV and FM DX — TV DX and FM DX is the active search for distant radio or television stations received during unusual atmospheric conditions. The term DX is an old telegraphic term meaning long distance. VHF/UHF television and radio signals are normally limited… …
32Edward Victor Appleton — Infobox Scientist name = Sir Edward Appleton imagesize = 120px caption = Edward Victor Appleton in army uniform, taken in World War I. birth date = birth date|1892|9|6 birth place = Bradford, West Yorkshire, England death date = death date and… …
33Aurora (astronomy) — Aurora Borealis redirects here. For other uses, see Aurora Borealis (disambiguation). Aurora Australis redirects here. For the ship, see Aurora Australis (icebreaker). For the book, see Aurora Australis (book). Northern lights redirects here. For …
34Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …
35Magnetosphere — A magnetosphere is formed when a stream of charged particles, such as the solar wind, interacts with and is deflected by the intrinsic magnetic field of a planet or similar body. Earth is surrounded by a magnetosphere, as are the other planets… …
36Geomagnetic storm — This article is about disturbances within Earth s magnetosphere. For other uses of magnetic storm , see Magnetic storm (disambiguation). Solar particles interact with Earth s magnetosphere. A geomagnetic storm is a temporary disturbance of the… …
37Schumann resonances — The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth s electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the …
38F region — the ionospheric region in which the F layer forms. [1925 30] * * * ▪ atmospheric science highest region of the ionosphere, at altitudes greater than 160 km (100 miles); it has the greatest concentration of free electrons and is the most… …
39F region — The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer , after the English physicist Edward Appleton. As with other ionospheric sectors, layer implies a concentration of plasma, while region is the… …
40Atmosphere of Venus — Atmosphere of Venus …
