The article discusses how standard clocks on Earth are adjusted to account for gravitational and rotational effects to establish accurate coordinate time. It explains that the gravitational potential and second-order Doppler shift due to Earth's rotation impact clock rates. By synchronizing clocks based on these adjustments, a framework is created for reliable timekeeping and navigation on the geoid. The section also mentions the local frame for the Moon, which outlines its near-spherical shape and hydrostatic equilibrium, playing a vital role in referencing time and motion across celestial bodies.
To compensate for relativistic effects, standard clocks on Earth are adjusted based on gravitational potential and the second-order Doppler shift due to rotation.
Clocks at rest on the geoid beat at rates equal to International Atomic Time, facilitating navigation and timekeeping near the Earth's surface.
The proper time on a clock at rest on the geoid aligns closely with coordinate time, thanks to the cancellation of specific shifts.
In constructing local frames, it’s important to recognize the Moon's hydrostatic equilibrium, defining a working frame for observations.
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