油毡
发表于 2025-3-28 18:05:17
Transformations Between Celestial and Terrestrial Reference Framese frames, celestial equator, equinox, pole positions, etc., depending on whether they are affected by precession only or also by nutation. Reference epoch designation must also follow. For the theory of precession and nutation, see Chapter 8.
Transfusion
发表于 2025-3-28 22:08:41
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Emmenagogue
发表于 2025-3-29 01:08:45
Introductionematics and the dynamics that are behind is one of the major tasks of geodesy, geophysics and astronomy. Without trying to be exhaustive, let us mention some of the dynamical phenomena that currently concern these sciences:
树上结蜜糖
发表于 2025-3-29 06:22:03
Stellar Reference Framesone had to measure the positions of these reference stars with respect to a system of spherical coordinates. The choice of the axes was imposed by the Earth’s rotation: the celestial equator and the meridian half plane crossing it at the vernal equinox point. Traditionally the equatorial system is d
朋党派系
发表于 2025-3-29 10:28:40
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周年纪念日
发表于 2025-3-29 14:49:18
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ANN
发表于 2025-3-29 16:06:10
Relativistic Theory of Celestial Reference Framesthe construction of astronomical reference frames. In contrast with Newtonian mechanics one cannot introduce in GRT the global Galilean (inertial) coordinates. The coordinates of GRT are in general not unique and equally admissible. This results in the intrusion of coordinate-dependent, unmeasurable
柔软
发表于 2025-3-29 21:08:13
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谄媚于性
发表于 2025-3-30 03:33:00
Conventional Terrestrial Reference Frames see Chapter 8), with respect to the pole (third axis) of a conventionally selected earth “fixed” (terrestrial) reference frame (CTS). The latter is usually selected to be near the average position of the CEP taken over a certain time interval and is called the Conventional Terrestrial Pole (CTP). I
Mettle
发表于 2025-3-30 07:32:20
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