IGSN71 - IGSN

Japanese: IGSN71 - あいじーえすえぬ
IGSN71 - IGSN


[Gravity Reference Net]
While the normal gravity formula is a theoretical formula for the spheroidal Earth determined by a , f , ω, G , M , etc., gravity values ​​have been measured all over the world to know the distribution of gravity in more detail. These measurements have been compiled into a new gravity network called the International Gravity Standardization Network 1971 (IGSN71). Until then, gravity values ​​all over the world were determined based on the sole standard of absolute measurements using a reversible pendulum performed in Potsdam in 1906, and were called the Potsdam gravity value. …

*Some of the terminology that mentions "IGSN71" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:


[重力基準網]
 正規重力式がa,f,ω,G,Mなどで決定される回転楕円体地球に対する理論的な式であるのに対し,より詳細な重力の分布を知るために世界各地で重力値が実測されている。この測定値をとりまとめて国際重力基準網1971(IGSN71,International Gravity Standardization Network 1971)という新たな重力網が完成している。それまで世界各地の重力値は1906年発表のポツダムで行われた可逆振子による絶対測定を唯一の基準にして決定され,ポツダム系重力値と呼ばれてきた。…

※「IGSN71」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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