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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Calibration and assessment of Swarm ion drift measurements using a comparison with a statistical convection model

Fig. 2

Solar wind, IMF, and Swarm measurements for a single event. a IMF B x (black), B y (blue), B z (pink) components, b solar wind electric field (E sw), c Swarm A along-track component of the measured ion drift with satellite velocity subtracted (mean of the values measured by the horizontal and vertical sensors), d Swarm A cross-track component of the measured ion drift (measured by the horizontal sensor), and e Swarm A ion temperature (T ion). In (c) and (d) the gray line indicates the along-track and cross-track components of the velocity for the corresponding CS10 statistical model, calculated at the coordinates of Swarm measurements within the high-latitude convection zone. In (c) and (d) the horizontal black lines indicate the offset used to correct Swarm ion drift data. All data are presented for the July 4, 2014, interval during which time the IMF and solar wind are in a quasi-stable state based on criteria described in “Identifying periods of quasi-stable solar wind and IMF” section. In (ce), data flagged in the TII data file as being of poor quality are shown in blue, and data flagged by eye inspection as being unreliable are shown in green. Vertical red lines at 07:33:50 UT and 07:47:27 UT indicate the time at which the satellite footprints cross the HMB for the corresponding CS10 statistical model

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