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Dispersion relation of electromagnetic ion cyclotron waves using Cluster observations

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Figure

Fig. 1. Plasmapause crossing on 30 March 2002 as viewed from Cluster 1. Graphs, from top to bottom, show (a) energetic ion density recorded by CIS, (b) ion velocity from CIS, (c) magnetic field strength from FGM, (c) magnetic field waveform spectra from ST
Fig. 2. Frequency–time wavelet spectrogram of ULF waves observed on 30 March 2002, on Cluster 1 (B y component of magnetic field) from FGM
Fig. 4. The joint frequency–1ψ spectrum of the B y component of the magnetic field, for the same wave packets as pictured in Fig
Fig. 5. Hodogram representation of a fragment of the same wave packet as in Fig. 3 seen from the Cluster 4 fluxgate magnetometer data.

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