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Fig. A.1.
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M87* (u, v) coverage of VLBI scans shown for the band 3 (227.1 GHz) data on April 13 and 18, 2021. The co-located ALMA, APEX, JCMT, and SMA stations are described by the Chile and Hawaii points, respectively. The labelling is done by antenna, using conjugate baselines to display the other station.
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