Top panel: plasma electron density at the Rosetta orbiter in the time interval 07:00-14:00 of 2016 February 19. The black line indicates the RPC-MIP/LAP cross-calibrated plasma electron density while the orange dots represent the RPC-MIP plasma electron density. Bottom panel: RPC-MAG magnetic field components measured at the Rosetta orbiter in the time interval 07:00-14:00 of 2016 February 19. In particular, the Bx (blue line), By (orange line) and Bz (yellow line) components are shown together with the total magnetic field (black line). The 20-min time intervals used to compute Fig. 3 are shown as horizontal solid lines below the time tags, using the same color code.