kilometric - определение. Что такое kilometric
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Что (кто) такое kilometric - определение

AURORAL KILOMETRIC RADIATION

Auroral kilometric radiation         
Auroral kilometric radiation (AKR) is the intense radio radiation emitted in the acceleration zone (at a height of three times the radius of the Earth) of the polar lights. The radiation mainly comes from cyclotron radiation from electrons orbiting around the magnetic field lines of the Earth.
Kilometre         
  • Historical divisions of the meridian in France
UNIT OF LENGTH EQUAL TO 1,000 METERS
Kilometer; Km; Kilometres; Kilometers; Klick (unit of length); ㎞; Kilometrage; Kilo meter; Kilo meters; Klick (kilometer); Chilometre
·noun A measure of length, being a thousand meters. It is equal to 3,280.8 feet, or 62137 of a mile.
kilometre         
  • Historical divisions of the meridian in France
UNIT OF LENGTH EQUAL TO 1,000 METERS
Kilometer; Km; Kilometres; Kilometers; Klick (unit of length); ㎞; Kilometrage; Kilo meter; Kilo meters; Klick (kilometer); Chilometre
['k?l??mi:t?, k?'l?m?t?]
(US kilometer) (abbrev.: km)
¦ noun a metric unit of length equal to 1,000 metres (approximately 0.62 miles).
Derivatives
kilometric adjective
Origin
C18: from Fr. kilometre (see kilo-, metre1).
Usage
There are two possible pronunciations for kilometre: one with the stress on the ki- and the other with the stress on the -lo-. The first is traditionally considered the correct one, while the second is still regarded as incorrect by some people, especially in British English.

Википедия

Auroral kilometric radiation

Auroral kilometric radiation (AKR) is the intense radio radiation emitted in the acceleration zone (at a height of three times the radius of the Earth) of the polar lights. The radiation mainly comes from cyclotron radiation from electrons orbiting around the magnetic field lines of the Earth. The radiation has a frequency of between 50 and 500 kHz and a total power of between about 1 million and 10 million watts. The radiation is absorbed by the ionosphere and therefore can only be measured by satellites positioned at vast heights, such as the Fast Auroral Snapshot Explorer (FAST). According to the data of the Cluster mission, it is beamed out in the cosmos in a narrow plane tangent to the magnetic field at the source. The sound produced by playing AKR over an audio device has been described as "whistles", "chirps", and even "screams".

As some other planets emit cyclotron radiation too, AKR could be used to learn more about Jupiter, Saturn, Uranus and Neptune, and to detect extrasolar planets.