Spatial Structure of Far Ultraviolet Martian Dayglow Observed by EMM-EMUS | CU Experts

Mars’ ultraviolet airglow has been used to study its upper atmosphere; for over four decades. Identifying variations in emission features has; provided information on composition, density and temperature. The; Emirates Mars Ultraviolet Spectrometer onboard the Emirates Mars Mission; observes Mars’ airglow at Far and Extreme UV wavelengths. Variations in; disk emission features are studied, with a focus on O I 1304 Å, CO; Fourth Positive Group and C I 1561 Å. All show variations with local; time and emission angle as expected. Dawn-dusk asymmetry observed is; attributed to local time differences in advection. Variations in the; brightness of several dayglow features, including 1304 Å, with irregular; shapes are noted in around 25% of the disk images. These display some; local time and hemispheric asymmetry in their occurrence rates.; Examination of their spatial structure, occurrence, and spectra suggests; these are associated with variations in composition and photoelectron; flux.

England SL; Jain S; Deighan J; Chaffin MS; Holsclaw G; Evans JS; Correira J; Fillingim MO; Lillis RJ; Almatroushi H

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