0125218 - ASU-R 20030124 RIV RO eng C - Conference Paper (international conference)
Vondrák, Jan - Ron, Cyril
An improve optical reference frame for long-term Earth rotation studies.
Journées 2002 - Systemes de reference spatio-temporels. Bucharest: Astronomical Institute of the Romanian Academy, 2003, s. 49-55.
[Journées 2002 - Systemes de reference spatio-temporels. Bucharest (RO), 25.09.2002-28.09.2002]
R&D Projects: GA AV ČR IAA3003205
Institutional research plan: CEZ:AV0Z1003909
Keywords : Earth orientation * star catalogue
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

The Earth orientation parameters were determined in past at the Astronomical institue. During the solution the authors discovered that not all Hipparcos stars are suitable for such a long-term study. The article describes the new catalogues that are based on the combination of the Hipparcos catalogue with past ground-based observations.
Permanent Link: http://hdl.handle.net/11104/0023476