Fig. 3.From: Magnetospheric ULF wave studies in the frame of Swarm mission: a time-frequency analysis tool for automated detection of pulsations in magnetic and electric field observationsCHAMP track with a spike. As in Fig. 2 but from 18:48 to 19:17 UT on 13 February 2003. The noise is also marked here with a ‘[FALSE]’ (in red) flag in the lower panel.Back to article page