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Fig. 1


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The difference between Digisonde and TaD EDPs. Digisonde profile (red curve) is obtained from Ebro ionosonde station at 07:00 UT on 5 June 2001. The figure shows O+ (magenta line) and H+ profiles (dashed blue line), whose sum compose TaD EDP (green line). The transition height is indicated with the yellow line.

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