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Ionospheric F2-layer behavior as it was observed in November 2008 above Pruhonice observatory. The top panels show the course of Dst, AE, and Kp indices. Two bottom panels are for foF2 (solid green line) and hmF2 (solid blue line). The solid black line represents 27-days running mean. The middle panel gives difference between the daily foF2 and its 27-days running mean in percentage.
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