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Multiview Phase Corrections at Low Frequencies for Precise Astrometry

Authors: G. Orosz, M. J. Rioja, R. Dodson, H. Imai, S. Frey5

Journal: Transactions of IAA RAS vol. 40

Pages: 34–39

Year: 2017

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About the paper

Keywords: VLBI, astrometry, technique, radio continuum, masers

We present a multi-calibrator solution, i. e. MultiView, to achieve accurate astrometry on the level of the thermal noise at low VLBI frequencies dominated by ionospheric residuals. We demonstrate on L-band VLBA observations how Multi- View provides superior astrometry to conventional phase referencing techniques [1]. We also introduce a new trial method to detect antenna based systematic errors in the observations [2]. All presented methods and results are based on our recent papers [2, 1].