緯い度ど変へん化か

noun, noun or participle which takes 'suru'

latitude variation

Technical term in astronomy and geodesy referring to the periodic change in the observed latitude of a point on Earth, primarily due to the Chandler wobble and other polar motion effects.

• 緯い度ど変へん化かの観かん測そくから、地ち球きゅうの極きょく運うん動どうが研けん究きゅうされている。

  From observations of latitude variation, the Earth's polar motion is studied.

• この天てん文もん台だいでは長なが年ねんにわたり緯い度ど変へん化かを記き録ろくしている。

  This observatory has been recording latitude variation for many years.