Sensitivity of UT1 determined by single-baseline VLBI to atmospheric delay model, terrestrial and celestial reference frames |
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Authors: | Jan Hefty Anne-Marie Gontier |
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Institution: | (1) Slovak Technical University, Department of Theoretical Geodesy, Radlinskeho 11, 81368 Bratislava, Slovak Republic, XX;(2) Observatoire de Paris – Central Bureau of IERS, 61, Avenue de l'Observatoire, 75014 Paris, France , FR |
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Abstract: | At the present time, the daily VLBI observations on the Westford-Wettzell baseline is the only continually running VLBI project
for studies of high-frequency Earth rotation variations. An analysis of this experiment with regard to the potential errors
in the atmospheric delay model and in adopted celestial and terrestrial reference frames is presented in the paper. A new
VLBI geometric delay model is applied and an algorithm for global adjustment for this specific single-baseline VLBI developed.
The results over three years show discrepancies at the milliarcsecond level between the daily observations and the adopted
atmospheric model as well as the combined celestial reference frame. A significant number of these discrepancies are removed
by the global adjustment.
Received: 19 August 1996; Accepted: 13 September 1996 |
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