0124660 - ASU-R 20000116 RIV US eng C - Conference Paper (international conference)
Vondrák, Jan - Ron, Cyril - Pešek, I.
Survey of observational techniques and Hipparcos reanalysis.
Polar motion: historical and scientific problems. San Francisco: Astronomical Society of the Pacific, 2000 - (Dick, S.; Mccarthy, D.; Luzum, B.), s. 239-250. Conference series., 208.
[Colloquium of the International Astronomical Union /178./. Cagliari (IT), 27.09.1999-30.09.1999]
R&D Projects: GA AV ČR KSK1003601
Institutional research plan: CEZ:AV0Z1003909
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

Polar motion and Universal Time have been regulary determined since 1899 and 1956. Before the International Earth Rotation Service was established in 1988, the classical astrometry instruments were used. The survey of all these instruments and the methods of observation used is described.
Permanent Link: http://hdl.handle.net/11104/0022919