Time evolution of n_e (in cm⁻³) during the VFB on August 10, 2021. The brown triangles and crosses represent n_e measured by RPW and EAS respectively, time-shifted to the location of BepiColombo. The red stars represent n_e after the integration of the entire electron energy spectra without applying any corrections, while the blue dots represent n_e after the integration of the entire electron spectra with the secondary electrons removed. The green dotted line indicates the time of the bow shock crossing of the induced magnetosphere of Venus by BepiColombo.