A summary of in situ measurements during the HCS crossing of Solar Orbiter from 2023 April 11 to 2022 April 13 by the SWA and MAG instruments. (a) Plasma β based on SWA and MAG. (b)–(d) Proton number density N_p, temperature T_p, and velocity V_p as measured by SWA-PAS. (e) Total (∣B∣, red) and radial (B_r, black) components of the interplanetary magnetic field (nT) measured by MAG. The dashed line signifies 0 nT. (f) PAD of electrons measured by SWA-EAS. The color scale shows the electron PSD. (g) Alfvénicity evaluated by the correlation coefficient of δB and δV in Radial (R), Tangential (T), and Normal (N) coordinates. The dashed line indicates a correlation coefficient of 0. (h) Cross helicity between B and V. (i) O⁶⁺ temperature normalized by the proton temperature reported by PAS (blue). (j) Charge-state ratios for C⁶⁺/C⁵⁺ (red) and for O⁷⁺/O⁶⁺ (blue). (k) Fe/O ratio. Three strahl dropouts (SDO) regions are shaded in green while the rest of the B_r < 0 region of interest is shaded in blue. The region near the true sector boundary is shaded in red and marked as HCS. The two red dashed lines represent the reversals of cross helicity and Alfvénicity, respectively. The B_r > 0 region is shaded in gray.