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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Transient ionization of the mesosphere during auroral breakup: Arase satellite and ground-based conjugate observations at Syowa Station

Fig. 1

North–south intensity profiles of the hard-electron aurora at 670 nm and the soft-electron aurora at 845 nm as observed by the meridian scanning photometer at Syowa Station (top two panels). A single north (0°) to south (180°, poleward) scan takes 10 s. The middle panel shows the ratio between the intensities of 670 nm and 845 nm. The bottom two panels show the estimated characteristic energy and total energy flux of auroral electrons as estimated from the two wavelengths (Ono 1993; Ono and Morishima 1994)

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