Orientation of the magnetic field for PSP’s second encounter. In panels a, b, and c we display the magnetic field components normalized by the radial distance B_R(r/r_min)², B_T(r/r_min), and B_N(r/r_min) (homogeneous to nT), with r the Sun-to-spacecraft distance and r_min = 35.6 R_⊙ the radial distance at perihelion. The normalized magnetic field amplitude, B(r/r_min)², is displayed as well in black in panel a. The gray shaded intervals are manually selected quiet solar wind intervals (cf. Sect. 3). In panel d we plot the 2D distribution of B_R(r/r_min)² and B_T(r/r_min), with the marginal distributions on the sides. Black contours surround the core of the distribution, and the color scale represents the number of samples. The average Parker spiral field over the encounter is marked as a white cross. In the bottom panels, we display the points located more than 60° away from the radial direction (e), the Parker spiral (f), and a 6-hour-mode vector (g), with the black contours a reminder of the core of the total distribution.