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Figure 5

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Ionograms from the Juliusruh ionosonde (54.63°N; 13.37°E) at 15-min intervals on 14th July 2018. The ionograms shown are at timestamps of 17:03 UT (top left panel), 17:18 UT (top right panel), 17:33 UT (bottom left panel) and 17:48 UT (bottom right panel). Pink and green colours represent the ordinary and extraordinary wave modes respectively.

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