Geodetic GPS receivers produce directly three-dimensional coordinates in a geocentric coordinate frame.
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So what are the geocentric coordinates of the Empire State Building in New York City?
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GPS navigation relies on such geocentric coordinates.
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TT was formally defined in terms of Geocentric Coordinate Time ( TCG ), defined by the IAU on the same occasion.
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Secondly, is that declination the parameter calculated for the Moon in geocentric coordinates ? ( You talkin'to me ? ), 06 : 16, 25 February 2010 ( UTC)
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"' Geocentric coordinates "'are an " Earth-centered " system of locating objects in the solar system in three-dimensions along the Cartesian X, Y and Z axes.
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The instant that the gravitational correction started to be applied serves as the epoch for Barycentric Coordinate Time ( TCB ), Geocentric Coordinate Time ( TCG ), and Terrestrial Time ( TT ), which represent three fundamental time scales in the solar system.
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The present definition of TT is a linear scaling of Geocentric Coordinate Time ( TCG ), which is the proper time of a notional observer who is infinitely far away ( so not affected by gravitational time dilation ) and at rest relative to Earth.
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Where TT and TCG are linear counts of SI seconds in Terrestrial Time and Geocentric Coordinate Time respectively, L G is the constant difference in the rates of the two time scales, and E is a constant to resolve the epochs ( see below ).
10.
Geocentric Coordinate Time ( TCG ) is based on a reference frame comoving with the geocenter ( the center of the Earth ), and is defined in principle for use for calculations concerning phenomena on or in the region of the Earth, such as planetary rotation and satellite motions.
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