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On the altitude dependence of transversely heated O<sup>+</sup> distributions in the cusp/cleft

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Fig. 1. Two-dimensional (invariant latitude-altitude) sketch that il- il-lustrates the transport patterns of ion outflows from an ionospheric source of finite latitudinal extent 13 throughout the cusp/cleft and dayside polar cap, in conjunction with a high
Fig. 2. From the left to the right, 3 examples of ion velocity distributions in cm −3 km −3 s 3 measured by Akebono/LEP at r=2.5 R E , Interball-2/Ion at r=4.0 R E , and Cluster/CODIF at r =5.5 R E .
Fig. 3. Overview of a transverse O + ion heating event on 28 September 2001, between 05:40 and 06:30 UT: (a) time-energy spectrogram of O + ions, (b) O + ion density in cm − 3 , (c) upward mean velocity in km s −1 , (d) perpendicular mean energy in eV, (e)
Fig. 4. From top to bottom, number of ion conical distributions per altitude range, and scatterplots of different oxygen ion quantities:
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