(u, v) coverage of the proposed orbital migration scheme. The temporal and angular resolutions are denoted by t_res and θ_res, respectively, with the corresponding values in gravitational units denoted by the subscript, G. The angle φ_pr represents the angular sampling of the photon ring at each stage. The top and bottom panel coverage is generated using ehtim and spacevlbi packages, respectively, with the latter imposing the constraint of maintaining a real-time downlink connection with ground stations. The VLBI ground array and the downlink station locations are given in Table B.1.