Wind magnetic field, plasma, and electron number flux observations across the four HCS crossings. First HCS crossing: panel (a) shows the magnetic field magnitude and the field components in LMN coordinates; panel (b) shows the proton velocity in the LMN coordinates with the mean velocity being subtracted; panel (c) shows the proton number density and temperature; and panel (d) shows the electron number flux at 165 eV energies for different pitch angles (PAs). Panels (e)–(p) show the corresponding parameters for the other three crossings. The L and N vectors of the local LMN coordinate system, average V_LMN, and the current sheet widths (δ_CS) computed from V_N and expressed in units of ion inertial length scale (d_i) are given. The cyan and white shading show the current sheet intervals. The gray shading shows the predicted V_L based on the Walén relation.