(a) One of the SW-C passes on the MLT-MLAT dial in the magnetic apex coordinates, and corresponding auroral oval (shaded red region), which was calculated from the model by Xiong & Lühr (2014). The point E (or P) represents the intersection of the orbit and the equatorward (or poleward) boundary of the dawnside part of the auroral oval, and M is the middle of their points. (b) IMF and solar wind plasma data from OMNI between 17:40 and 21:30 UT on 24 August, 2020. From top to bottom, the three components of IMF (B_X, B_Y, and B_Z) in GSM coordinate, the solar wind proton density, and flow speed are plotted. The vertical dotted lines at 21:12:02 UT indicate the time when SW-C crossed the point M.