Geocentric Co-ordinate Time

A form of Geocentric Coordinate Time — A coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to precession, nutation, the Moon, and artificial satellites of the Earth, equivalent to the proper time experienced by a clock at rest in a coordinate frame co-moving with the center of the Earth.

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Meanings

proper noun
  1. alternativeAlternative spelling of Geocentric Coordinate Time.

    In 1991, the International Astronomical Union defined the Terrestrial Time (TT) in terms of the Geocentric Co-ordinate Time.

    2007, Pranab Ghosh, World Scientific Series in Astronomy and Astrophysics X: Rotation and Accretion Powered Pulsars (World Scientific Publishing Co. Pte. Ltd.; →ISBN, 9789810847447), chapter 7: “Properties of Rotation Powered Pulsars”, subchapter 7.2: ‘Timing Properties’, section 7.2.3: “Irregular Period Changes”, subsection 7.2.3.2: ‘Millisecond pulsars as stable clocks’, page 338
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APA

Geocentric Co-ordinate Time. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Geocentric%20Co-ordinate%20Time

MLA

“Geocentric Co-ordinate Time.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Geocentric%20Co-ordinate%20Time. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Geocentric Co-ordinate Time,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Geocentric%20Co-ordinate%20Time.

Source: Geocentric Co-ordinate Time on Wiktionary, CC BY-SA 4.0.