Interval of PSP observations during Encounter 2. First panel: radial component of the magnetic field, B_R, and the field magnitude, |B|. Second panel: tangential component of the field, B_T. Third and fourth panels: radial and tangential components of the proton core velocity, v_R and v_T, respectively. Here, the black lines are the measurements of the proton core by SPC (for details, see Case et al. 2020) and the red dots are the fits to the proton core from SPAN-Ai. All measurements are in RTN coordinates. Fifth panel: proton core density, n_p, from SPAN and electron density, n_e, from QTN measurements. Last panel: proton parallel (T_p,∥) and perpendicular (T_p,⊥) temperature, where the colour-scale of T_p,∥ is the angle, θ_RB, between the radial direction and B. During this interval the large-scale field is sunward so that θ_RB = 180° indicates the radial direction.