Profiles across a reconnecting current sheet at t = 534.5 s along the cut marked with the dashed blue line, labeled “⊥” in left panel of Fig. B.1 and centered with the 0 location along the cut to correspond to the X-point location in Fig. B.1. The panels show (a) mass density of neutrals (dashed orange line) and charges (solid blue line); (b) the flow velocity along the direction of the cut for the charges (solid blue line, left axis) as well as the relative drift between charges and neutrals (dashed red line, right axis); (c) the in-plane magnetic field component normal to the cut and along the current sheet; (d) the out-of-plane current density J_y; and (e) the out-of-plane magnetic field B_y. Panel f shows the calculated ideal electric field in the frame of reference of the charged fluid at the X-point (solid black line), and the ŷ-component of the effective dissipative electric field, η₆μ₀∇⁴J_y, present due to numerical dissipation (dashed green line). The width of the reconnection current sheet is measured to be λ_J = 5.323 km as the full width at half max of the J_y profile in panel d.