Fig. 4From: Statistical analysis of geomagnetic field intensity differences between ASM and VFM instruments onboard Swarm constellationExample of empirical mode decomposition. From top to bottom Swarm A \(\Delta F_{\mathrm{P}}\); IMF\(_k\) for \(k = 1, \ldots , 19\) and the residue resulting from EMD applied to Swarm A \(\Delta F_{\mathrm{P}}\). The characteristic timescale increases with the IMF number k Back to article page