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- W2963930166 abstract "The SKA will deliver orders of magnitude increases in sensitivity, but most astrometric VLBI observations are limited by systematic errors. In these cases improved sensitivity offers no benefit. The best current solution for improving the accuracy of the VLBI calibration is MultiView VLBI, where multiple simultaneous observations around the target are used to deduce the corrections required for the line of sight to the target. We have estimated and quantified the applicability of MultiView from real-world ionospheric studies, making projections into achievable astrometric accuracies. These predict systematic measurement errors, with calibrators separated by several degrees, of $sim$10$mu$as with current VLBI facilities. For closer calibrators, that are in-beam for single dish VLBI facilities, we predict systematic measurement errors of a few $mu$as. This is the ideal combination, where the sensitivity of the SKA will provide the precision and MultiView will provide the accuracy. Based on these results we suggest that the SKA design should increase the number of VLBI beams it can form from four to as many as ten." @default.
- W2963930166 created "2019-07-30" @default.
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- W2963930166 date "2019-07-03" @default.
- W2963930166 modified "2023-10-16" @default.
- W2963930166 title "Investigations on MultiView VLBI for SKA" @default.
- W2963930166 doi "https://doi.org/10.22323/1.344.0086" @default.
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