Radar antennae array

Radar antennae array

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Credit: BRITISH ANTARCTIC SURVEY/SCIENCE PHOTO LIBRARY

Caption: Radar antennae array known as the Southern Hemisphere Auroral Radar Experiment (SHARE). It is situated at the Halley Research Station, Antarctica. Aurorae are luminous displays that appear in the night sky near the North & South poles. They are formed when charged particles (solar wind) from the sun encounter the gases of the Earth's atmosphere. SHARE functions in a similar way to surveillance radar, sending a beam of high-frequency radio waves every two minutes, which scans 4 million square kilometres of the ionosphere, the upper atmosphere that lies from 50-1000 kilometres above the surface.

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Keywords: antarctic, antarctica, antenna array, antennae, astronomy, astrophysics, atmosphere, atmospheric, aurora, aurorae, climate, electromagnetic radiation, ionosphere, polar, radar experiment, radio, share, southern hemisphere auroral, southern lights

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