(u,v) coverage of the EHT and representative ring image obtained by DoG-HIT (EHTC 2025) in 2017, 2018, and 2021. Upper panels: (u,v) with the SMT-KP (red) and PV-NOEMA baselines (green) highlighted. These are used to constrain the jet base emission. Middle panels: a zoomed-in view of the (u,v) coverage, highlighting the short and intermediate baselines. We also highlight the (u,v) coordinates related to spatial scales of 1000 μas and 200 μas, corresponding to the expected range for extended emission. Bottom panels: DoG-HIT image of the central ring obtained from these data (EHTC 2025).