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Τι (ποιος) είναι auroral$5947$ - ορισμός

AURORAL KILOMETRIC RADIATION

Substorm         
  • reconnection]] fronts.
SHORT TERM DISTURBANCE IN THE MAGNETOSPHERE
Magnetospheric substorm; Auroral substorm
A substorm, sometimes referred to as a magnetospheric substorm or an auroral substorm, is a brief disturbance in the Earth's magnetosphere that causes energy to be released from the "tail" of the magnetosphere and injected into the high latitude ionosphere. Visually, a substorm is seen as a sudden brightening and increased movement of auroral arcs.
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.
High-frequency Active Auroral Research Program         
  • Audio heard from HAARP
  • HAARP antenna array
THE MOST PROMINENT INSTRUMENT AT HAARP IS THE IONOSPHERIC RESEARCH INSTRUMENT (IRI), A HIGH-POWER RADIO FREQUENCY TRANSMITTER FACILITY OPERATING IN THE HIGH FREQUENCY (HF) BAND.
Haarp; HAARP; Project HAARP; HAARP Project; Ionospheric heater system; Tesla magnifying transmitter; Nick Begich (author); High Frequency Active Auroral Research Program conspiracy theories; HARRP; Ionospheric Research Instrument; HAARP conspiracy theory; High Frequency Active Auroral Research Program; Nick Begich Jr.; Nick Begich, Jr.
The High-frequency Active Auroral Research Program (HAARP) was initiated as an ionospheric research program jointly funded by the U.S.

Βικιπαίδεια

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.