Zoom-in plot of magnetic field and plasma parameters around the PDR and TD. (a) Magnitude and (b) three-component magnetic field in the LMN coordinate system. (c) Number density of protons from SWIA. (d) Ion components from STATIC. (e) Speed and (f) velocity of protons in the LMN coordinates. (g) Three-component proton temperature. (h) Ratio of perpendicular temperature to parallel temperature of protons from SWIA. (i) Plasma beta. (j) MAVEN position (red start) with respect to Trotignon’s MPB model (black curve; Trotignon et al. 2006) in the X–R plane, where. (k− l) Hodograms of the magnetic field during MAVEN passing across the TD. The red, green, and blue dots correspond to the vertical dashed lines in the left panels. The rotation angle from B₁ to B₂ is 112°, and |⟨B_N⟩∕B₀| = 0.016.