Baseline coverage of the 7 April Sgr A^* (top) and 11 April 2017 M87^* (bottom) 226.1–228.1 GHz EHT data processed with RPICARD. The Chile and Hawai’i markers encompass baselines to the co-located ALMA–APEX and JCMT–SMA stations, respectively. The data are averaged over VLBI scan durations and over all frequency channels here and the zero-spacings between co-located sites are not plotted. Conjugate baseline pairs (1–2 and 2–1) are displayed differently following the legends shown in the upper panel.