Solar Orbiter in situ signature. The blue line represents the HCS, the yellow area is the perturbed slow wind and the gray area is the unperturbed fast wind. From top to bottom: V:proton velocity, N:proton density; T:proton temperature; P:total pressure; β: plasma beta; B:total magnetic field strength; S_p:specific proton entropy; O⁷⁺/O⁶⁺: O⁷⁺/O⁶⁺ ratio; r: distance of the spacecraft to the Sun; LAT: latitude of the spacecraft in HCI. Error bars on top of the plot show the uncertainties in the region classification.