Equatorial maps of plasma density, radial speed and magnetic field as simulated by RIMAP, starting from the PSP data collected from January 15 to 21, 2021. The dashed black line is the PSP trajectory (projected on the equatorial plane), and the black segment from 3.5 to 6.3 R_⊙ is drawn at the Metis’ plane-of-the-sky latitude on January 17. The solid red line is the field line connecting PSP measurements and Metis observations. The white line (black in the third panel) represents the Alfvén point for each streamline.