Conventional International Origin

Conventional International Origin (CIO) is a conventionally defined reference axis of the pole's average location on the Earth's surface over the year 1900.[1]

Polar motion is the movement of Earth's rotation axis across its surface. The axis of the Earth's rotation tends, as the axis of a gyroscope, to maintain its orientation to inertial space. The Conventional International Origin is used to measure this movement.

References

General
  • Bernard Guinot (2003). "Newsletter 2". "Nomenclature for Fundamental Astronomy" (NFA). IAU. Retrieved 2010-02-07.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.