Fig. 1.

From top to bottom: (a) height profiles of the electron number density measured by MARSIS, blue and red symbols correspond to the measurements made on the inbound and outbound orbital legs, respectively; (b) solar zenith angles (solid curves) and the value of the model crustal magnetic field; (c) fluxes of 20–40 eV electrons. Dashed vertical lines show the positions of the induced magnetospheric boundary on inbound and oubound orbital pathes determined from the drop of fluxes of the magnetosheath-like electrons.