Example of an SWA-EAS BM event, showing 5 min of data recorded on 26th June 2020. Top panel: B-field unit vector received over S20 from MAG. Panel 2: illustrates the selection of the EAS elevation bins for each sample, based on the MAG data. Panel 3: azimuth of the field in the 2 SWA-EAS science frames, while panel 4 indicates the sensor head selected to supply data. Panels 5 and 6: contain the data recorded in the elevation bins containing the field and anti-field aligned directions for each measurement sample. These data, for electrons of energy > 70 eV, are recorded as a function of azimuth at 0.125 s cadence. Bottom panel: data rebinned into pitch angle space, showing that a full PAD was obtained for most of the duration of the event. See text for details.