...Therefore, it is common to observe multiple specific curves or surfaces that include one's own position, and determine the position by finding their common parts. The specific curves and specific surfaces mentioned here are called the line of position or the surface of position, respectively, and their usage differs depending on the coordinate system and the origin that they are based on. In general, the line of position is used in navigation on the Earth's surface, while the surface of position is used in navigation for aircraft and spacecraft, but since aircraft fly relatively close to the Earth's surface, the line of position is also often used. *Some of the terminology explanations that refer to the "position aspect" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…そこで,自身の位置を含む複数個の特定曲線,あるいは曲面を観測により求め,これらの共通部分を知ることで位置としているのが一般である。なお,ここでいう特定曲線,あるいは特定曲面は,それぞれ位置の線line of position,あるいは位置の面と呼ばれ,またこれらの基準となる座標系および原点のとり方によって使われ方が異なっているといえよう。 一般には,位置の線は地表面の航法で用いられ,位置の面は,航空機や宇宙船の航法で用いられると区別されるが,航空機は比較的地表面に近いところを飛ぶので位置の線もよく用いられる。… ※「位置の面」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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