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A balloon satellite (also occasionally referred to as a "satelloon", which is a trademarked name owned by Gilmore Schjeldahl's G.T. Schjeldahl Company) is a satellite that is inflated with gas after it has been put into orbit. ==List of Balloon Satellites== abbreviations: * pcr = passive communications reflector, satellite reflects microwave signals. * ado = atmospheric density observations * spc = solar pressure calculations, estimate impact of solar wind on orbit. * tri = satellite triangulation, measuring the Earth's 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「balloon satellite」の詳細全文を読む スポンサード リンク
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