“Geocentric Coordinate Time”的概念、定义、翻译、参考文献-科学参考

Geocentric Coordinate Time

Astronomy

The time-scale used in the Geocentric Celestial Reference System, the unit of which is the SI second. TCG differs from Terrestrial Time because a clock on the Earth’s surface is moving with respect to the geocentric frame and feels the gravitational field of the Earth. Terrestrial Time is in effect a conveniently scaled TCG that differs from International Atomic Time (TAI) only by a fixed offset. The rate difference between TCG and Terrestrial Time is about 22 ms per year.

单词	Geocentric Coordinate Time
释义	Geocentric Coordinate Time Astronomy The time-scale used in the Geocentric Celestial Reference System, the unit of which is the SI second. TCG differs from Terrestrial Time because a clock on the Earth’s surface is moving with respect to the geocentric frame and feels the gravitational field of the Earth. Terrestrial Time is in effect a conveniently scaled TCG that differs from International Atomic Time (TAI) only by a fixed offset. The rate difference between TCG and Terrestrial Time is about 22 ms per year.
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