Earth orientation determinations by short duration VLBI observations

Details Earth orientation determinations by short duration VLBI observations Earth orientation determinations by short duration VLBI observations

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994bgeod..68....1n&link_type=abstract

Bulletin Géodésique, Volume 68, Issue 1, pp.1-6

Astronomy and Astrophysics

Astronomy

1

Scientific paper

In May 1989 and April 1990 the radio telescopes of the Wettzell Geodetic Fundamental Station in Germany and of the Shanghai Observatory near Seshan in China observed two series of daily VLBI experiments of short duration for precise determination of UT1. In 1990 a few experiments were complemented by the Hartebeesthoek Radio Astronomy Observatory in South Africa and the Medicina telescope of the Bologna Istituto di Radioastronomia in Italy. Employing the South African station together with the east-west baseline formed by the observatories of Seshan and Medicina permitted simultaneous determinations of UT1 and polar motion. Here we report on the results of these observations. Comparing the UT1 results with those of the IRIS Intensive series gives a clear indication of the absolute accuracy of such short duration VLBI measurements which is estimated to be of the order of ±60 µs.

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