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Ionospheric Connection Explorer
The Ionospheric Connection Explorer (ICON) is a planned science mission for NASA's Explorer program, designed to study the connection between the Earth’s weather and space weather. Led by the University of California, Berkeley,〔(【引用サイトリンク】url=http://newscenter.berkeley.edu/2013/04/16/uc-berkeley-selected-to-build-nasas-next-space-weather-satellite/ )〕 ''ICON'' will provide NASA’s Heliophysics Division with a new capability to observe the connection between the Earth’s thermosphere and ionosphere.〔(【引用サイトリンク】url=http://icon.ssl.berkeley.edu )〕 ''ICON'' was one of 11 proposals selected for NASA funding in September 2011, down from the original 22 submitted in February of that year. On April 12, 2013, NASA announced that ''ICON'', along with Global-scale Observations of the Limb and Disk (''GOLD''), had been selected for launch in 2017,〔(【引用サイトリンク】url=http://www.nasa.gov/home/hqnews/2013/apr/HQ_13-088_Astro_Explorer_Mission_.html )〕 with the cost capped at $200 million, excluding launch costs. The principal investigator of ''ICON'' is Thomas Immel of the University of California, Berkeley.〔
==Mission concept==
Once launched, ''ICON'' will perform a two-year mission to observe conditions in both the thermosphere and ionosphere.〔 ''ICON'' will be equipped with four instruments: a Michelson interferometer, built by the United States Naval Research Laboratory, will measure the winds in the thermosphere; an ion drift meter, to be built by UT Dallas, will measure the motion of charged particles in the ionosphere; and two Ultraviolet imagers will observe the airglow layers in the upper atmosphere in order to determine both ionospheric and thermospheric density and composition.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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