Overview of spacecraft positions and in situ solar wind data. (a) WSA/HUX ambient solar wind speed in the ecliptic plane and spacecraft positions on 2020 April 20 00:00 UT in Heliocentric Earth Equatorial (HEEQ) coordinates. (b) Solar Orbiter magnetic field components in Radial-Tangential-Normal (RTN) coordinates, (c) BepiColombo magnetic field data in Heliocentric Earth Ecliptic coordinates (HEE), (d) wind magnetic field data in HEE coordinates, and (e) the wind proton speed and density (solid lines) and the WSA/HUX solar wind speed at Earth and Solar Orbiter (dashed lines). Vertical lines indicate from left to right the shock arrival time and the beginning and end times of the flux rope, determined visually.