Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..16e...6t&link_type=abstract
Nomenclature, Precession and New Models in Fundamental Astronomy, 26th meeting of the IAU, Joint Discussion 16, 22-23 August 200
Astronomy and Astrophysics
Astronomy
Scientific paper
The International Celestial Reference Frame (ICRF) is realised by high precision coordinates of the extragalactic radio sources observed by VLBI. Only radio sources with stable positions should be used in the ICRF catalogue to maintain long-term stability of the reference system. However, some radio sources previously treated as astrometrically stable, show significant variations in position on different time scales. In this paper the positional instabilities of selected radio sources are discussed. It is shown that apparent proper motions for frequently observed objects can reach 1 mas/year over several years. Therefore, more careful procedure of the reference radio source selection should be applied. Several global solutions based on different sets of reference radio sources have also been obtained using OCCAM software by the least squares collocation method. These solution statistics and resulted astrometric position catalogues were investigated to draw conclusion about more effective scheme for the reference radio source selection.
No associations
LandOfFree
Problems of the reference radio source selection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Problems of the reference radio source selection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Problems of the reference radio source selection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1624802