Extended Data Fig. 2: The trajectory of wavefront corrugations sweeping over both the Goldstone and Green Bank antennas is illustrated.

Radar echoes from Venus sweep over the surface of the Earth during the 2020 Sept. 08 observations. Diagrams show the trajectory of the speckles one hour before (left), during (center), and one hour after (right) the epoch of maximum correlation. Echoes from two receive stations (red triangles) exhibit a strong correlation when the antennas are suitably aligned with the trajectory of the speckles (green dots shown with a 1 ~ s time interval).