The four main auroral lines studied in this paper and their properties. The width in column 5 corresponds to the spectral size of the instrument interference filters and not to the upper atmospheric emission.
|Altitude (km)||Colour||Element||Transition||Wavelength (nm)||Energy threshold (eV)|
|220||Red||O||1D → 3P||630 ± 1||1.96|
|110||Green||O||1S → 1D||557.7 ± 5||4.00|
|80||Blue||1st negative band||427.8 ± 5||18.75|
|80||Purple||1st negative band||391.4 ± 5||18.75|
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.