スギモト タケシ   Sugimoto Takeshi
  杉本 剛
   所属   神奈川大学  工学部 情報システム創成学科
    神奈川大学大学院  工学研究科 工学専攻(情報システム創成領域)
   職種   教授
言語種別 英語
発行・発表の年月 2018/10
形態種別 学術雑誌
標題 The Longitude Problem as the Unification of Space and Time
With Special Application to the Island of St Helena
執筆形態 単著
掲載誌名 Forma
掲載区分国内
出版社・発行元 SciPress
巻・号・頁 33 (Special Issue),pp.S17-S22
概要 Determination of the longitude is the unification of space and time. The course note is presented to understand the points in the longitude problem within the framework of 16-8 Centuries. Establishing local time is difficult, because there are leads and lags of the Sun's culminations, known as 'Equation of Time.' The Sun's motion in the celestial sphere is nonlinear because of geometrical and gravitational reasons. The novel algorithm is proposed to get the rigorous Equation of Time. Three brilliant astronomers, Edmond Halley, Nevil Maskelyne and Manuel John Johnson, had stayed in St Helena. They themselves determined the longitude of the island by different methods. By use of their and other observations of astronomical events the new calculations are available. These are the sources of the exercises.