Fig. 3From: On the modelling of M2 tidal magnetic signatures: effects of physical approximations and numerical resolutionGeomagnetic power spectra. Geomagnetic power spectra at the Earth surface (solid lines and symbols) and at the satellite altitude of 400 km (dashed lines). Results of the 2-D approaches elmgFD and x3dg are shown for increasing resolution and compared with two calculations of elmgFD in 3-D settingsBack to article page