Overview of Juno spacecraft observations from 02:05 UT to 02:15 UT on 2017 May 16. (a)–(d) Magnetic field B _t (total field) and magnetic field components B _x , B _y , and B _z in the X-line coordinates. (e) Horizontal angle, defined as ﹩\arctan (\sqrt{{B}_{z}^{2}+{B}_{y}^{2}}/{B}_{x})﹩. The dashed line represents the horizontal angle equal to 15°. (f) The currents integrated from the center of the magnetodisc to the satellite position; the blue dots represent where the magnetic field B _x dominates, corresponding to horizontal angles less than 15°.