Fig. 5

Daily rms of difference \(\Delta \mathbf{B} = \mathbf {B}_\text {obs} - \mathbf {B}_\text {mod}\) at non-polar latitudes for the three vector components in the NEC frame and for scalar intensity \(\Delta F = F_\text {obs} - F_\text {mod}\) (bottom), for all three FGM fluxgate magnetometers.