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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Scale analysis of equatorial plasma irregularities derived from Swarm constellation

Fig. 2

a Example of equatorial plasma irregularity (EPI) detected from the electron density observation of Swarm A. The top panel represents the original electron density series (Ne) with 2 Hz resolution, and the bottom panel shows the high-pass filtered and rectified signals. The dashed lines in the bottom panel represent the upper limit (UL) and lower limit (LL) applied for the automatic EPIs detection approach. Frames b and c present two examples of EPIs observed by the three Swarm satellites during the early mission phase. For each event, the top panel represents the original electron density series (Ne) with 2 Hz resolution, the middle panel represents the reconstructed background Ne profil and the bottom panel represents ΔNe with background subtracted

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