Fig. 6.From: Rapid modelling of the large-scale magnetospheric field from Swarm satellite dataThe Magnitude Squared Coherence between the (internal) coefficients from the FTMM and the TDS-1 reference model for all frequencies (top) and for periods greater than two days (bottom). The coherency is good for periods greater than two days but falls off steadily for shorter periods. A sharp dip at 24 hours is likely due to ionospheric field contamination.Back to article page