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SPOT ((フランス語:Satellite Pour l’Observation de la Terre),〔(【引用サイトリンク】title=SPOT - Looking Down on Earth )〕 lit. "Satellite for observation of Earth") is a commercial high-resolution optical imaging Earth observation satellite system operating from space. It is run by Spot Image, based in Toulouse, France. It was initiated by the CNES (''Centre national d'études spatiales'' – the French space agency) in the 1970s and was developed in association with the SSTC (Belgian scientific, technical and cultural services) and the Swedish National Space Board (SNSB). It has been designed to improve the knowledge and management of the Earth by exploring the Earth's resources, detecting and forecasting phenomena involving climatology and oceanography, and monitoring human activities and natural phenomena. The SPOT system includes a series of satellites and ground control resources for satellite control and programming, image production, and distribution. Earlier satellites were launched using the European Space Agency's Ariane 2, 3, and 4 rockets, while SPOT 6 and SPOT 7 were launched by the Indian PSLV.〔(【引用サイトリンク】title=ISRO prepares for historic 100th mission )〕〔(【引用サイトリンク】title= Isro's PSLV-C23 lifts off with five foreign satellites )〕 SPOT Image is marketing the high-resolution images, which SPOT can take from every corner of the Earth. * SPOT 1 launched February 22, 1986 with 10 panchromatic and 20 meter multispectral picture resolution capability. Withdrawn December 31, 1990. * SPOT 2 launched January 22, 1990 and deorbited in July 2009. * SPOT 3 launched September 26, 1993. Stopped functioning November 14, 1997. * SPOT 4 launched March 24, 1998. Stopped functioning July, 2013. * SPOT 5 launched May 4, 2002 with 2.5 m, 5 m and 10 m capability. * SPOT 6 launched September 9, 2012. * SPOT 7 launched on June 30, 2014. == The SPOT orbit == The SPOT orbit is polar, circular, sun-synchronous, and phased. The inclination of the orbital plane combined with the rotation of the Earth around the polar axis allows the satellite to fly over any point on Earth within 26 days. The orbit has an altitude of 832 kilometers, an inclination of 98.7°, and completing 14 + 5/26 revolutions per day. 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「SPOT (satellite)」の詳細全文を読む スポンサード リンク
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