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OSO 7 or Orbiting Solar Observatory 7 (NSSDC ID: 1971-083A), before launch known as OSO G is the seventh in the series of American Orbiting Solar Observatory satellites launched by NASA between 1962 and 1975.〔(OSO 7 ) NASA HEASARC〕 OSO 7 was launched from Cape Canaveral on 29 September 1971 by a Delta N rocket into a 33.1° inclination, low-Earth (initially 321 by 572 km) orbit, and re-entered the Earth's atmosphere on 9 July 1974. It was built by the Ball Brothers Research Corporation (BBRC), now known as Ball Aerospace, in Boulder Colorado. While the basic design of all the OSO satellites was similar, the OSO 7 was larger (spacecraft mass was 635 kg (1397 lb) ) than the OSO 1 through OSO 6, with a larger squared-off solar array in the non-rotating "Sail", and a deeper rotating section, the "Wheel".〔(OSO 7 in orbit ) A photograph of the OSO 7 taken before launch, on a black background as it might have appeared in space.〕 ==Sail instruments== The "Sail" portion of the spacecraft, which was stabilized to face the Sun in all the OSO series satellites, carried two instruments on OSO 7, which continuously viewed the Sun during orbit day. These were: * The GSFC X-Ray and EUV Spectroheliograph (covering the wavelength range 2 to 400 Å),〔(X-Ray and EUV Spectroheliograph (2 to 400 Å) )〕 under the direction of P.I. Dr. Werner M. Neupert of the NASA GSFC which imaged the Sun in the Extreme Ultraviolet and soft X-ray bands, to determine the temperature and distribution of matter in the corona above active regions and during solar flares. * The NRL White-Light Coronagraph and Extreme Ultraviolet Corona Experiment, directed by Dr. Richard Tousey of the US Naval Research Laboratory,〔(NSSDC OSO 7 White-Light Coronagraph and Extreme Ultraviolet Corona Experiment )〕 which imaged the while light corona, using an occulting disk, allowing comparison between the structure of the corona and the active regions on the solar surface. 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「OSO 7」の詳細全文を読む スポンサード リンク
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