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Fig. 6


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Air pressure (black lines), MUF(3000) data (red lines), and monthly median MUF(3000) for January (orange line) for Dourbes (top) and Ebre (bottom) for the period from 12 UT on January 15 to 12 UT January 16. Note that there are some gaps in the MUF(3000) data, especially at Dourbes, due to unscalable ionograms.

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