The Contribution of VLBI to the Realization of a Celestial Reference System

Details The Contribution of VLBI to the Realization of a Celestial Reference System The Contribution of VLBI to the Realization of a Celestial Reference System

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997itn....23a...3g&link_type=abstract

Definition and realization of the International Celestial Reference System by VLBI astrometry of extragalactic objects. (IERS Te

Astronomy and Astrophysics

Astronomy

Scientific paper

Observations of celestial bodies, whether natural or artificial and including the Earth itself, can be used to describe motions only if they can be referred to a System of coordinate axes that are assumed to be fixed in space, or that have well known time variations with respect to something eise that is fixed. These fixed axes are referred to as a celestial reference System. To make possible the comparison of results obtained in various fields, it is advantageous to adopt conventionally one definition of the celestial reference System. These coordinate axes can only be accessed indirectly through coordinates of a set of fiducial objects. Such a set of coordinates is referred to as a celestial reference frame.

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