Fig. 3.
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Time series of observations at Solar Orbiter II. The top four panels show EPT magnet channel observations by telescope repeated from Fig. 2. Vertical dashed and dotted lines and annotations are repeated from that figure for easier comparison, as are the dashed and dotted VDA curves for helium ions and protons. The fifth panel from the top shows solar wind bulk speed (black), Alfvén speed (dotted black), temperature (red, right-hand axis), and density (blue, right-hand axis). The sixth panel shows tangential (T) and normal (N) components of the bulk velocity, and the seventh shows IMF data in RTN coordinates. A horizontal, thin, dash-dotted gray line has been added to indicate 0 nT. The seventh panel shows the power spectral density of the fluctuations in the IMF, as well as the approximate proton gyro-period in the solar wind rest frame (dashed line) and the period at which energetic protons are in first-order cyclotron resonance (solid line). The solid black line shows the Alfvénic Mach number (MA, right-hand axis). The bottom panel shows the 70 eV electron pitch-angle distribution as measured by SWA.
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