Titlebook: Astrometry of Fundamental Catalogues; The Evolution from O Hans G. Walter,Ojars J. Sovers Book 2000 Springer-Verlag Berlin Heidelberg 2000

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dura-mater

The Conventional Fundamental Catalogue FK5,on of a fundamental system of positions and proper motions of the stars. Utmost efforts are made to arrive at a catalogue of star positions that represents an inertial frame. The immediate purpose of the catalogue is to serve as the reference frame of positional astronomy. It should also fulfill the

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Astrometry with Radio Interferometers,on of the technique of radio interferometry to the measurement of positions of sources at cosmological distances. With this target in mind we briefly introduce the scope of radio astronomy, followed by a short outline concerning the basic terms and concepts of radio interferometry. We discuss the si

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Fundamental Catalogues of Extragalactic Radio Sources,e advantages of an extragalactic system rest, first, upon the observed positions of extragalactic objects (EGOs) whose rotation, when averaged over a large number of objects, would be representative of the rotation of the Universe, which, however, is assumed to be zero according to the discussion in

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The International Celestial Reference Frame: ICRF, belongs to the category of conventional fundamental catalogues. It does not differ fundamentally from the numerous radio catalogues produced during the preceding two decades. This catalogue is merely another member of the category of reference frames produced by the `observable method’ discussed in

Interlocking

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Future Prospects,s employed for connecting observables and their mathematical representation. Accordingly, the associated reference frame and catalogue of celestial objects, which represents the system, are transient products adopted for some interval of time. Typical of this development of a system is the FK5 refer

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