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Letter to the Editor
Baseline errors in European VLBI Network measurements III. The dominant effect of instrumental polarization.
M. Massi 1, 2, 3,
M. Rioja 1,
D. Gabuzda 4,
K. Leppänen 1,
H. Sanghera 1,
K. Ruf 3 and
L. Moscadelli 1, 3
Received 10 September 1996 / Accepted 14 November 1996
In this paper, we compare the results of a VLBI observation involving 7 European telescopes with the model by Massi et al. 1996 for the contribution of the instrumental polarization to the closure phase. The excellent agreement found between model predictions and data proves that the systematic error present in European VLBI data is in fact due to the high instrumental polarization of some of the telescopes and can be removed by data processing.
Key words: Methods: analytical- Methods: data analysis- Techniques: interferometric - Instrumentation: interferometers
Send offprint requests to: M. Massi
Online publication: July 8, 1998