Intermediate results are reported from a program of VLBI radio observations designed to establish a link between the rotating reference frame of the ESA Hipparcos astrometric satellite and the extragalactic VLBI frame being developed by the International Earth Rotation Service. A group of 12 link stars have been observed at various epochs since 1982, and more observations are being undertaken during the 3-yr Hipparcos mission (1989-1992). Analysis of data on Algol indicates that phase-reference VLBI can determine an expected sky displacement of 4 marcsec with an uncertainty of 0.5 marcsec, even when the activity is only a few mJy.
VLBI astrometry and the Hipparcos link to the extragalactic reference frame
Advances in Space Research ; 11 , 2, 19
1991-01-01
Sonstige
Keine Angabe
Englisch
Hipparcos Extragalactic Link: the Potsdam Contribution
British Library Online Contents | 1997
|Connection of the Hipparcos Catalogue to the Extragalactic Reference Frame
British Library Online Contents | 1997
|The HIPPARCOS space astrometry mission
Elsevier | 1983
|