Recurrent fast stream observed by Solar Orbiter and its source on the Sun. Left: hourly averaged Solar Orbiter data during the first months of the mission (between 15 July and 15 October 2020). From top to bottom: magnitude of the solar wind speed (a); distance from the Sun (b); and Carrington longitude (c), of the Solar Orbiter spacecraft. Right: partial synoptic maps from SDO/AIA 193 Å constructed from daily observations from 1 to 28 August (top panel) and 1 to 28 September (bottom panel). White and pink lines show magnetic field lines traced through a PFSS model from the source surface (dots) to the solar surface (crosses).