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 MultiView provides superior astrometry to conventional phase referencing techniques (Rioja et al. 2017). We also introduce a new trial method to detect antenna based systematic errors in the observations (Orosz et al. 2017}. All presented methods and results are based on our recent papers (Orosz et al. 2017; Rioja et al. 2017).
@article{arxiv.1804.02826,
title = {MultiView phase corrections at low frequencies for precise astrometry},
author = {Gabor Orosz and Maria J. Rioja and Richard Dodson and Hiroshi Imai and Sandor Frey},
journal= {arXiv preprint arXiv:1804.02826},
year = {2018}
}
Comments
Published in the proceedings of the 13th European VLBI Network Symposium and Users Meeting (20-23 September 2016, St. Petersburg, Russia)