Fig. 8
Top: daily mean (in nanotesla) of difference \(\Delta \mathbf{B} = \mathbf{B }_{{\mathrm{obs}}} - \mathbf{B }_{{\mathrm{mod}}}\) at non-polar latitudes for the three vector components in the NEC frame and for scalar intensity \(\Delta F = F_{{\mathrm{obs}}} - F_{{\mathrm{mod}}}\). Vertical dashed lines indicate, respectively, 06 LT of the ascending node (red) and 18 LT (blue). Middle: Local Time of Ascending Node (LTAN). Bottom: daily rms (in nanotesla) of \(\Delta \mathbf{B} \) and \(\Delta F\), respectively