Comparison of Omni and 3D electron energy spectra and the density derived from the 3D and Omni data product. Upper panel: Omni count rate energy spectra measured on August 10, 2021, with MEA 1. Middle panel: 3D virtual channel count rate energy spectra measured on the same day with MEA 1. Lower panel: comparison of the n_e, 3D calculated from 3D data product without secondary electrons and n_e, Omni shifted at n_e, 3D (blue dots and red plus signs, respectively). The vertical green dotted line represents the bow shock crossing.