EDP Sciences
Free access
Volume 367, Number 3, March I 2001
Page(s) 1070 - 1077
Section Celestial mechanics and astrometry
DOI http://dx.doi.org/10.1051/0004-6361:20000494

A&A 367, 1070-1077 (2001)
DOI: 10.1051/0004-6361:20000494

IAU resolutions on reference systems and time scales in practice

V. A. Brumberg1 and E. Groten2

1  Institute of Applied Astronomy, 191187 St. Petersburg, Russia
2  Institute of Physical Geodesy, 64287 Darmstadt, Germany

(Received 6 October 2000 / Accepted 12 December 2000)

To be consistent with IAU/IUGG (1991) resolutions ICRS and ITRS should be treated as four-dimensional reference systems with TCB and TCG time scales, respectively, interrelated by a four-dimensional general relativistic transformation. This two-way transformation is given in the form adapted for actual application. The use of TB and TT instead of TCB and TCG, respectively, involves scaling factors complicating the use of this transformation in practice. New IAU B1 (2000) resolution is commented taking in mind some points of possible confusion in its practical application. The problem of the relationship of the theory of reference systems with the parameters of common relevance to astronomy, geodesy and geodynamics is briefly outlined.

Key words: relativity -- reference systems -- time -- astrometry -- celestial mechanics

Offprint request: E. Groten groten@ipgs.ipg.verm.tu-darmstadt.de

SIMBAD Objects in preparation

© ESO 2001