Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-25T14:03:57.159Z Has data issue: false hasContentIssue false
  • English
  • Français

The Present Status of Preparing the New Reduction of the Past Astrometric Observations to Obtain the Earth Orientation Parameters in the Hipparcos Reference System

Published online by Cambridge University Press:  07 August 2017

J. Vondrák  and
C. Ron
J. Vondrák
Affiliation:
Astronomical Institute Budečská 6 12023 Prague Czech Republic
C. Ron
Affiliation:
Astronomical Institute Budečská 6 12023 Prague Czech Republic

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The IAU Working group on Earth rotation in the Hipparcos reference frame, set up by IAU Commission 19 in 1988, is presently preparing the algorithms and collecting the data obtained by optical astrometry since the beginning of the century. The main idea is to use the observations of individual stars rather than group results, all recalculated in the unique system of astronomical constants and algorithms. The final solution will be referred to the celestial reference frame realized by the Hipparcos star catalog presently under preparation. All known geophysical influences (as e.g. solid and oceanic Earth tides or plate tectonic movements) will be included into the model. In addition to traditional Earth rotation parameters (polar motion, universal time), also the pole offset components in the celestial reference frame will be solved for, as well as other relevant parameters (systematic seasonal deviations of the individual stations, instrumental constants etc.). The present status of the solution and the time evolution of its expected accuracy are described.

Type
Ground-Based Optical Astrometry
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 95 - 100
Copyright
Copyright © Kluwer 

References

Abalakin, V.K.(ed.), 1985. Refraction Tables of Pulkovo Observatory , 5th ed., Nauka Leningrad Google Scholar
Bougeard, M.L., 1988. A&A Supp. 72, 171 Google Scholar
Bougeard, M.L., 1992. A&A 255, 388 Google Scholar
Chandler, S.C., 1891. A.J. 248, 59 CrossRefGoogle Scholar
Capitaine, N., 1990. Cel. Mech. Dyn. Astron. 48, 127 Google Scholar
Capitaine, N., (ed.), 1991a. Journées 1991 Systèmes de Référence Spatio-temporels. Obs. de Paris Google Scholar
Capitaine, N. 1991b. In: Capitaine 1991a, 213 Google Scholar
DeMets, C., Gordon, R.G., Argus, D.F., Stein, S., 1990. Geophys. J. Int. 101, 425 Google Scholar
Guinot, B., 1979. In: McCarthy, D.D. & Pilkington, J.D. (Eds.): Time and the Earth's Rotation , IAU Symp. 82, Reidel, Dordrecht, 7 CrossRefGoogle Scholar
Hefty, J., 1991. In: Capitaine 1991a, 217 Google Scholar
Korsun, A.A., Feissel, M., Yatskiv, Ya.S., 1989. Kinematika i fizika nebesnykh tel 5, 90 Google Scholar
Kovalevsky, J., 1992. IERS 1992 Workshop , Obs. de Paris Google Scholar
Kurzynska, K., 1991. In: Capitaine 1991a, 223 Google Scholar
Li, Z.X., Chen, Y.F., Qian, C.X., 1991. In: Capitaine 1991a, 204 Google Scholar
Lieske, J.H., 1979. A&A 73, 282 Google Scholar
McCarthy, D.D.(Ed.), 1992. IERS Standards , IERS Tech. Note 11, Paris, in press CrossRefGoogle Scholar
Pešek, I., 1992. A&A , in press Google Scholar
Ron, C., Vondrák, J., 1986. Bull. Astron. Inst. Czechosl. 37, 96 Google Scholar
Seidelmann, P.K., 1982. Cel. Mech. 27, 79 Google Scholar
Vondrák, J., 1991a. Bull. Astron. Inst. Czechosl. 42, 283 Google Scholar
Vondrák, J., 1991b. In: Capitaine 1991a, 193 Google Scholar
Vondrák, J., Feissel, M., Essaïfi, N., 1992. A&A 262, 329 Google Scholar