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Determination of Venus’ Interior Structure with EnVision

Abstract : The Venusian geological features are poorly gravity-resolved, and the state of the core is not well constrained, preventing an understanding of Venus’ cooling history. The EnVision candidate mission to the ESA’s Cosmic Vision Programme consists of a low-altitude orbiter to investigate geological and atmospheric processes. The gravity experiment aboard this mission aims to determine Venus’ geophysical parameters to fully characterize its internal structure. By analyzing the radio-tracking data that will be acquired through daily operations over six Venusian days (four Earth’s years), we will derive a highly accurate gravity field (spatial resolution better than ~170 km), allowing detection of lateral variations of the lithosphere and crust properties beneath most of the geological features. The expected 0.3% error on the Love number k2, 0.1° error on the tidal phase lag and 1.4% error on the moment of inertia are fundamental to constrain the core size and state as well as the mantle viscosity.
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http://hal.univ-nantes.fr/hal-03429212
Contributor : Pascal Rosenblatt Connect in order to contact the contributor
Submitted on : Tuesday, November 16, 2021 - 12:01:19 PM
Last modification on : Tuesday, November 16, 2021 - 12:01:21 PM

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Pascal Rosenblatt, Caroline Dumoulin, Jean-Charles Marty, Antonio Genova. Determination of Venus’ Interior Structure with EnVision. Remote Sensing, MDPI, 2021, 13 (9), pp.1624. ⟨10.3390/rs13091624⟩. ⟨hal-03429212⟩

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