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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Estimation of the emission altitude of pulsating aurora using the five-wavelength photometer

Fig. 4

a Altitude-time plot of the ionospheric raw electron density (i.e., power profile data) obtained by the EISCAT UHF radar for an interval of pulsating aurora from 00:30 UT to 03:00 UT on 19 February 2018. b Time-series of the emission altitude of pulsating aurora estimated from the lifetime of O(1S) (blue line) and the peak height of E region ionization (hmE) from EISCAT (red line)

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