Titlebook: Reference Coordinate Systems for Earth Dynamics; Proceedings of the 5 E. M. Gaposchkin,B. Kołaczek Conference proceedings 1981 D. Reidel Pu

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Paraplegia

节省

The Definition of the Terrestrial Coordinate Frame by Long Baseline Interferometry,rame could be usefully defined, incorporating fully the effects of plate tectonics and secular motion of the observatories, by an application of the theory of continuum mechanics to interferometer observations.

激励

A new Parameterization of Polar Motion,ed as a function of the rotation vector components. In the rigid earth approximation three scalar parameters are necessary for evaluating point coordinate variations, namely spin rate of the earth, polar motion magnitude and spin rate of the polar motion vector. Two numerical examples are given as an illustration.

habitat

强所

哀悼

Relativistic Effects in Reference Frames,I, and similar effects are reviewed; they are usually on the order of 10. . Finally, the problem of a possible variation of the gravitational constant G (on the order of 10./year) is outlined; such a variation does not occur in special and general relativity, but is implied by certain generalized field theories which are less commonly accepted.

过于光泽

和平

Reference Coordinate Systems for Earth Dynamics: A Preview,well-defined inertial coordinate system in which the motions of the terrestrial system can be monitored. This paper deals with the problems encountered when establishing such coordinate systems and the transformations between them. In addition, problems related to the modeling of the deformable eart

散布

Establishment of Terrestrial Reference Frames by new Observational Techniques,tation locations used in either LAGEOS ranging or VLBI measurements as forming the vertices of a polyhedron. After correcting for tectonic plate motions using an adopted model, we expect the geometry of the polyhedron to be fairly stable over periods of the order of a year. However, after some perio