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Encyclopedia > SuperDARN

The Super Dual Auroral Radar Network (SuperDARN) is an international radar network for studying the upper atmosphere and ionosphere, comprised of ten radars in the northern hemisphere and seven in the southern hemisphere that operate in the High Frequency (HF) bands between 8 and 22 MHz. M*A*S*H , see Corporal Walter (Radar) OReilly. ... Saturns atmosphere is made up of hydorgen, helium and methane ... The ionosphere is the part of the atmosphere that is ionized by solar radiation. ... Insert non-formatted text here The Northern Hemisphere is the half of a planets surface (or celestial sphere) that is north of the equator (the word hemisphere literally means half ball). On the Earth, the Northern Hemisphere contains most of the land and population. ... Southern Hemisphere The Southern Hemisphere is the half of a planets surface (or celestial sphere) that is south of the equator (the word hemisphere literally means half ball). On Earth it contains four continents (part of Africa, Oceania, most of South America, and Antarctica) and four oceans (South Atlantic... High frequency (HF) radio frequencies are between 3 and 30 MHz. ... A megahertz (MHz) is one million (106) hertz, a measure of frequency. ...


The radars measure the Doppler velocity of plasma density irregularities in the ionosphere. Doppler radar uses the Doppler effect to measure the relative velocity information from a radar system. ... A Plasma lamp, illustrating some of the more complex phenomena of a plasma, including filamentation In physics and chemistry, a plasma is an ionized gas, and is usually considered to be a distinct phase of matter. ...


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SuperDarn: A radar network tuned into the magnetosphere (732 words)
One of the priorities of the SuperDARN network is to determine the nature and the number of the convection cells, which vary according to the orientation of the interplanetary magnetic field.
In the Northern hemisphere, the SuperDARN network is constituted by a longitudinal chain of 8 radars, extending from Alaska to Finland, and grouped together in pairs covering the same field of view for measuring vectorial velocity.
In the Southern hemisphere, where 4 SuperDARN radars are already in operation, the Kerguelen radar, coupled with a Japanese radar situated on the Antarctic base of Syowa, is being commissioned to play a special role.
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