(a) Top panel: PA curve of the total average pulse profile is represented by the green line, while the black line represents the PA curve of the average pulse profile folded from single pulses in Mode S at longitude I. Middle panel: Dotted lines represent the total average pulse profiles of I, L, and V, while the solid line represents the average pulse profile folded from the single pulses in Mode S at longitude I. (b) Statistical distribution of E_re: the orange color corresponds to all single pulses observed, while the green color corresponds to single pulses in Mode S at longitude I.