[PPS06-02] EnVision M5 Venus Orbiter Proposal
Keywords:Venus, Surface activity and history, Interior, Atmosphere
The Synthetic Aperture Radar, VenSAR, will:
- Obtain images at a range of spatial resolutions from regional coverage to images of targeted localities
- Measure topography from stereo and InSAR observation;
- Characterize volcanic and tectonic activity, estimate rates of weathering and surface alteration; and
- Characterize surface mechanical properties and weathering through multi-polarisation radar, and emissivity mapping.
The Subsurface Sounder, SRS, will:
- Characterize the vertical structure and stratigraphy of geological units including volcanic bows; and
- Determine the depths of weathering and aeolian deposits.
The Venus Spectrometer suite, VenSpec, will:
- Obtain global maps of surface emissivity in Wve wavelength bands in the near-infrared, to constrain surface composition and inform evolution scenarios; and
- Measure variations of SO2, SO and linked gases in the mesosphere, in order to link these variations to tropospheric variations and volcanism.
The Radio Science & Geodesy investigation will:
- Constrain crustal & lithospheric structure at Wner spatial scale than Magellan; and
- Measure spin rate and spin axis variations to constrain interior structure.
EnVision will produce a huge dataset of geophysical data of a quality similar to that available for Earth and Mars, so will permit investigation across a large range of disciplines. Lab-based and modelling work will also be required to interpret results from the mission. We therefore invite scientists from across planetary, exoplanetary and earth science disciplines to participate in the mission preparation and analysis of the data.
 Ghail R. C. et al., (2016) EnVision M5 proposal,https://arxiv.org/abs/1703.09010