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EISCAT (European Incoherent Scatter Scientific Association) operates three incoherent scatter radar systems, at 224 MHz, 931 MHz in Northern Scandinavia and one at 500 MHz on Svalbard, used to study the interaction between the Sun and the Earth as revealed by disturbances in the ionosphere and magnetosphere. At the Ramfjordmoen facility (near Tromsø, Norway), it also operates an ionospheric heater facility, similar to HAARP. Additional receiver stations are located in Sodankylä, Finland, and Kiruna, Sweden. The EISCAT Svalbard radar (ESR) is located in Longyearbyen, Norway. The EISCAT Headquarters are also located in Kiruna. EISCAT is funded and operated by research institutes and research councils of Norway, Sweden, Finland, Japan, China, the United Kingdom, France and Germany. The system was also tested for space debris tracking and the radars were proven to be capable of statistical observations of Low-Earth orbit (LEO) debris (altitudes of 500 to 1500 km) down to 2 cm in size. Since these measurements are insufficient to determine complete orbits, the radar has only limited space surveillance value.〔(【引用サイトリンク】title=Europe's Eyes on the Skies )〕 Because the space debris tracking change is only a dedicated back-end computer system, the primary EISCAT observations are not compromised. As a result of that, the EISCAT radars allow continuous monitoring of the LEO debris in a beam park mode, functioning as a space surveillance system part of the European Space Agency's Space Situational Awareness Programme (SSA).〔(【引用サイトリンク】title=ESA - Space Debris - Scanning & observing )〕 ==History== In 1973, the EISCAT proposal — which was originally planned for France, Germany and the three Nordic countries — seemed moribund. Then, Welsh physicist Granville Beynon became involved and by 1975, the agreement was signed, with the UK as a member. The proposal for UK membership had originally been turned down by the appropriate SRC committee. Beynon, however, persuaded the Board to reverse the decision of the committee and as a result of his efforts, hundreds of European scientists have had the opportunity to use the world's most advanced ionospheric radar.〔 In 2008, Doritos embarked upon an "out-of-this-world" advertising campaign, literally beaming a 30-second advertisement for Doritos brand tortilla chips into a solar system 42 light years away. This project is in collaboration with EISCAT Space Centre in Svalbard. The "You Make It, We'll Play It" contest chose the winning advertisement that was transmitted on June 12, 2008. The ad was beamed towards a distant star, within the Ursa Major constellation which is orbited by planets which may harbor life.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EISCAT」の詳細全文を読む スポンサード リンク
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