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Detection of green line emission in the dayside atmosphere of Mars from NOMAD-TGO observations

Aoki, S.; Vandaele, A. C.; Daerden, F. +13 more

The oxygen emission at 557.7 nm is a ubiquitous component of the spectrum of the terrestrial polar aurora and the reason for its usual green colour¹. It is also observed as a thin layer of glow surrounding the Earth near 90 km altitude in the dayside atmosphere^2,3 but it has so far eluded detection in other planets. Here we r…