Overview plot of the 2021 November 3 shock event. (a)–(b) Spectrograms of dynamic energy spectra measured by EPT’s sunward telescope (a) and STEP’s central 9 pixels (b). The horizontal dashed red line indicates the time interval during which proton bursts are observed. (c)–(d) Line profiles corresponding to the spectrograms in (a)–(b), respectively. STEP’s 32 energy bins and EPT’s 64 energy bins are grouped into 10 and 13 bins, respectively, with their central energies labeled on the right of the panels. (e) Temporal flux profiles of ∼268 keV protons measured by SIS’s sunward telescope (black) and ∼293 keV protons measured by EPT’s sunward telescope (pink). (f)–(h) Magnitude |B|, elevation angle θ_B, and azimuthal angle ϕ_B of the IMF. (i) Solar wind proton bulk speed |V_sw|. The IMF and solar wind speed are measured in the spacecraft frame. The dashed brown line marks the shock arrival, and the dashed yellow line marks the current sheet crossing.