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Aeronomy of the Venus Upper Atmosphere
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Aeronomy of the Venus Upper Atmosphere
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Journal Article
Aeronomy of the Venus Upper Atmosphere
2017
Overview
We present aeronomical observations collected using remote sensing instruments on board Venus Express, complemented with ground-based observations and numerical modeling. They are mostly based on VIRTIS and SPICAV measurements of airglow obtained in the nadir mode and at the limb above 90 km. They complement our understanding of the behavior of Venus’ upper atmosphere that was largely based on Pioneer Venus observations mostly performed over thirty years earlier. Following a summary of recent spectral data from the EUV to the infrared, we examine how these observations have improved our knowledge of the composition, thermal structure, dynamics and transport of the Venus upper atmosphere. We then synthesize progress in three-dimensional modeling of the upper atmosphere which is largely based on global mapping and observations of time variations of the nitric oxide and O
2
nightglow emissions. Processes controlling the escape flux of atoms to space are described. Results based on the VeRA radio propagation experiment are summarized and compared to ionospheric measurements collected during earlier space missions. Finally, we point out some unsolved and open questions generated by these recent datasets and model comparisons.
Publisher
Springer Netherlands,Springer Nature B.V,Springer Verlag,Springer Science & Business Media B.V
Subject
/ Aerospace Technology and Astronautics
/ Airglow
/ Astrophysics and Astroparticles
/ Aérospatiale, astronomie & astrophysique
/ dynamics
/ infrared
/ Physical, chemical, mathematical & earth Sciences
/ Physics
/ Physique, chimie, mathématiques & sciences de la terre
/ Space Exploration and Astronautics
/ Space science, astronomy & astrophysics
/ Space Sciences (including Extraterrestrial Physics
/ Venus
