Origins, Worlds, and Life A Decadal Strategy for Planetary Science and Astrobiology 2023-2032 (2022) / Chapter Skim
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D Missions Studied But Not Sent for TRACE As explained in Appendix C, the science mission concepts considered in this report came from three main sources: 1) missions studied by NASA science definition (SDT)
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Goals Science goals of Venera-D address key outstanding questions related to Venus' atmosphere and surface. The goals of Venera-D's orbiter are, in priority order, to: • Study the dynamics and nature of superrotation, radiative balance, and nature of the greenhouse effect; • Characterize the thermal structure of the atmosphere, winds, thermal tides, and solar locked structures; • Measure the composition of the atmosphere, study the clouds, their structure, composition, microphysics, and chemistry; • Study the composition of the low atmosphere and low clouds, surface emissivity, and search for volcanic events on the night side; and • Investigate the upper atmosphere, ionosphere, electrical activity, magnetosphere, the atmospheric escape rate, and solar wind interaction.
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Mission Challenges This mission has not yet received full support from the Russian Space Agency to begin development. The comprehensive nature of the mission and the multiple, as yet undefined, enhancements and international contributions will require substantial coordination.
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Mission Challenges The ADVENTS mission is complex, and faces mass and cost challenges associated with delivering to Venus and deploying an aerobot and dropsonde within the medium-class mission cost cap. The need for a dedicated orbital relay element also represents a considerable mission cost.
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Implementation This proposed medium-class mission relied on a static lunar lander designed to launch on a Falcon 9 Heavy Recoverable. Once placed in lunar transfer trajectory, the lander would enter polar lunar orbit, overfly the selected landing site, deorbit, and land.
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Goals The goal of the vestan version of the in situ geochronology mission concept is to determine the radiometric ages of vestan samples from locations whose geological context is known. In situ dating would constrain Vesta's geologic timescale by dating key stratigraphic craters and adjacent geologic terrains.
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MOIRE Origin and Rationale This concept was proposed in response to the PMCS announcement of opportunity and the study (CML ~4-5) was conducted at the Jet Propulsion Laboratory.
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MOSAIC Origin and Rationale This concept was proposed in response to the PMCS announcement of opportunity and the study (CML ~4-5) was conducted at the Jet Propulsion Laboratory (Lillis et al.
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Mission Challenges MOSAIC is very clearly a large-class mission addressing multiple questions with a complex array of instruments deployed on ten orbiters. Portions that might be flown as descoped constellations or standalone missions still may be too costly for consideration as medium-class missions.
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temperature of 120 K was selected to preserve amorphous water ice and entrained volatiles, as well as water-soluble organics and salt. Two ~1-to-100 g samples are collected from ~25 cm below the surface of 67P's nucleus via the so-called "shoot and go" technique using a harpoon while the spacecraft remains 5to-10 m above the surface.
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Implementation This large-class mission is designed to launch on an SLS Block 2 with a high-energy upper stage. A combination of a Jupiter gravity assist (in the early-2030s or early-2040s)
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Venera-D 2019, Venera-D: Expanding Our Horizon of Terrestrial Planet Climate and Geology Through the Comprehensive Exploration of Venus -- Report Of The Venera-D Joint Science Definition Team, Phase II Final Report, NASA Headquarters, Washington, D.C., and Space Research Institute, Moscow.
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