Origins, Worlds, and Life A Decadal Strategy for Planetary Science and Astrobiology 2023-2032 (2023) / Chapter Skim
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Pages 662-671
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Appendix 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 teams (SDTs)
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APPENDIX D 663 VENERA-D Origin and Rationale This mission concept study was performed by the Venera-D Joint Science Definition Team at the request of the Russian Space Agency, the Institute for Space Research Institute of the Russian Academy of Sciences, and NASA (Venera-D 2019)
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664 ORIGINS, WORLDS, AND LIFE Following release from the orbiter, the lander will sample the atmosphere and image the surface during descent to a landing site in a high-latitude region of the northern hemisphere. The lander includes a thermally insulated titanium pressure vessel with thermal storage batteries and is designed to operate for about 3 hours after landing.
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APPENDIX D 665 Conclusions ADVENTS can address many of the high-priority science objectives for Venus not covered by the VERITAS, DAVINCI, or Envision missions. However, ADVENTS overlaps with some objectives of the VISE mission, resulting in it being given a low priority for a TRACE study.
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666 ORIGINS, WORLDS, AND LIFE Mission Challenges A lack of mobility in this mission concept leads to uncertainty in the ability to obtain the needed samples to provide accurate dating of key events, particularly in geologically complex terrains. Top science objectives associated with dating ancient impact basins may be particularly challenging.
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APPENDIX D 667 Similar to the lunar dating mission (see above) , two different on-board instruments -- one examining rubidium and strontium isotopes and the other potassium and argon isotopes -- are used to determine independent age estimates.
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668 ORIGINS, WORLDS, AND LIFE The spacecraft's instrument complement includes the following: full polarization, ultra-high frequency synthetic aperture radar; a dual-band ice-sounding radar; a high-resolution, multiband imager; shortwave and thermal infrared imaging spectrometers, dual stereo cameras, and a wide-angle multispectral imager. Mission Challenges The mission had no novel risks or technical challenges; accommodation of the large radar imager and sounder and their power and data needs drove the SEP implementation choice.
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APPENDIX D 669 Implementation This large-class mission is designed to conduct simultaneous and systematic observations of the martian climate via eight science investigations carried out by 22 unique science instruments, hosted on 10 individual spacecraft. All are launched on a single Falcon Heavy Recoverable launch vehicle.
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670 ORIGINS, WORLDS, AND LIFE Following arrival, 4.1 years is devoted to the selection of sampling sites and sample-collection campaign. The return cruise to Earth takes another 5.7 years.
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APPENDIX D 671 the spacecraft will encounter a 50–100 km diameter KBO. Once at Pluto, the spacecraft conducts a 3-year tour of the dwarf planet and its five known satellites.
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