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16Th Meeting of the Venus Exploration and Analysis Group (VEXAG)

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Program 16th Meeting of the Venus Exploration and Analysis Group (VEXAG) November 6–8, 2018 Applied Physics Laboratory, Johns Hopkins University Laurel, Maryland Sponsors Lunar and Planetary Institute Universities Space Research Association Venus Exploration Analysis Group Program Committee Martha Gilmore, Wesleyan University Robert Grimm, Southwest Research Institute Candace Gray, New Mexico State University Patrick McGovern, Lunar and Planetary Institute Emilie Royer, University of Colorado Noam Izenberg, Applied Physics Laboratory Abstracts for this conference are available via the conference website at https://www.hou.usra.edu/meetings/vexag2018/ Abstracts can be cited as Author A. B. and Author C. D. (2018) Title of abstract. In 16th Meeting of the Venus Exploration and Analysis Group (VEXAG), Abstract #XXXX. LPI Contribution No. 2137, Lunar and Planetary Institute, Houston Lunar and Planetary Institute • 3600 Bay Area Boulevard • Houston, Texas 77058-1113 GUIDE TO SESSIONS 16th Meeting of the Venus Exploration and Analysis Group (VEXAG) November 6–8, 2018 Applied Physics Laboratory, Johns Hopkins University Laurel, Maryland Tuesday, November 6, 2018 8:30 a.m. Bldg. 200, Room 100 VEXAG Overview and International Venus Exploration 1:30 p.m. Bldg. 200, Room 100 Guidance Document Revisions, Mission Studies, Planning for Decadal Survey Wednesday, November 7, 2018 8:30 a.m. Bldg. 200, Room 100 Venus Surface and Interior Science 10:45 a.m. Bldg. 200, Room 100 Venus Astrobiology and Exoplanets 1:30 p.m. Bldg. 200, Room 100 Venus Atmosphere Science 4:00 p.m. Bldg. 200, Room 100 Poster Session: Venus Surface and Atmosphere Science 4:00 p.m. Bldg. 200, Room 100 Poster Session: Venus Technology and Instrument Studies Thursday, November 8, 2018 8:30 a.m. Bldg. 200, Room 100 Venus Technology and Instrument Studies PROGRAM Tuesday, November 6, 2018 VEXAG OVERVIEW AND INTERNATIONAL VENUS EXPLORATION 8:30 a.m. Bldg. 200, Room 100 Chairs: Robert Grimm and Martha Gilmore Times Authors (* Denotes Speaker) Abstract Title and Summary 8:30 a.m. Grimm R. E. * Welcome, Review of VEXAG Activities and Meeting 9:00 a.m. Ocampo A. * NASA Status, Responses to Prior VEXAG Findings 9:45 a.m. C. Mercer * High Operating Temperature Technology (HOTTech) Program Overview 10:00 a.m. Simons R. * PICASSO/MatISSE Instrument Development Programs 10:15 a.m. Break 10:30 a.m. Satoh T. * Akatsuki at Venus: Extended Mission 10:45 a.m. Gregg T. K. P. * Zasova L. Venera-D: A Potential Mission to Explore Venus’ Economou T. Eismont N. Surface, Atmosphere and Gerasimov M. Gorinov D. Ignatiev N. Plasma Environment [#8045] Ivanov M. Khatuntsev I. Korablev O. This presentation will summarize the current Kremic T. Jessup K. Limaye S. accomplishments of the Venera-D Joint Science Lomakin I. Martynov A. Ocampo A. Definition Team as we work to define a mission to explore Venus in the post-2025 timeframe. 11:00 a.m. Ghail R. C. * EnVision Team EnVision: Phase 0 Developments [#8028] EnVision was selected for Phase 0/A study in the ESA M5 round of medium-class missions. We will report on its conclusions as far as possible and detail opportunities for community involvement and collaboration. 11:15 a.m. Harikrishnan G. * Indian Space Research Organisation’s Plans for Venus Exploration 11:30 a.m. Lunch Tuesday, November 6, 2018 GUIDANCE DOCUMENT REVISIONS, MISSION STUDIES, PLANNING FOR DECADAL SURVEY 1:30 p.m. Bldg. 200, Room 100 Chairs: Robert Grimm and Martha Gilmore Times Authors (* Denotes Speaker) Abstract Title and Summary 1:30 p.m. Grimm R. E. * Intro to Current Studies 1:40 p.m. Treiman A. H. * VEXAG GOI Document 1:55 p.m. Hunter G. W. * VEXAG Technology Document 2:10 p.m. Cutts J. A. * VEXAG Roadmap Document 2:25 p.m. Gilmore M. S. * Venus Flagship Study 2:40 p.m. Jessup K. L. * Gilmore M. S. Venus’ Unique Role in Solar System History: The Grinspoon D. Limaye S. Luhmann J. Five Big Questions [#8050] Many questions remain regarding Venus’ atmospheric, interior and habitability evolution. It is imperative that the critical investigation goals in each of these areas is adequately communicated to the public, and in the upcoming Decadal Survey. 2:55 p.m. Gilmore M. S. * Decadal Survey Discussion 3:15 p.m. Break 3:30 p.m. Grimm R. E. * Venus Bridge Introduction 3:35 p.m. Hunter G. W. * Venus Bridge Study at Glenn Research Center 3:50 p.m. Cutts J. A. * Venus Bridge Study at Jet Proplusion Laboratory 4:05 p.m. Grimm R. E. * Venus Bridge Summary 4:15 p.m. Cutts J. A. * Matthies L. H. Hall J. L. Venus Aerial Platform Study [#8009] Thompson T. W. The Venus Aerial Platform Study assessed the Venus Aerial Platform Study Team science that can be accomplished for exploring Venus with aerial vehicles and the required technologies. 4:30 p.m. Izenberg N. R. * Venus Surface Platforms Wednesday, November 7, 2018 VENUS SURFACE AND INTERIOR SCIENCE 8:30 a.m. Bldg. 200, Room 100 Chairs: Jennifer Whitten and Richard Ghail Times Authors (* Denotes Speaker) Abstract Title and Summary 8:30 a.m. Treiman A. H. * Wroblewski F. B. Ovda Fluctus, the Festoon Lava Flow on Ovda Bhiravarasu S. Regio, Venus: Most Likely Basalt [#8014] We have mapped the lava flow Ovda Fluctus, on Ovda Regio, in detail. Ovda Fluctus has been interpreted as a silicic (rhyolite) lava flow. However, the preponderance of data suggests that it is composed of basaltic, not silicic, lava. 8:45 a.m. Whitten J. L. * Campbell B. A. Radar Backscatter Variations in Tessera Across Venus [#8018] Tessera radar brightness values vary across Venus. Some of these variations are spatially correlated with crater ejecta. Other brightness variations may be due to other fine grained materials and inherent differences in the tesserae source materials. 9:00 a.m. Campbell B. A. * Whitten J. L. New Insights on Maxwell Montes Surface Properties from Multi-Year Earth-Based Observations [#8030] We present initial results of Venus surface studies using Earth-based radar observations collected in 1988, 2012, 2015, and 2017. The new maps reveal unexpected variations in surface properties across Maxwell Montes. 9:15 a.m. Dyar M. D. * Helbert J. Boucher T. Venus Surface Oxidation and Weatehring as Maturilli A. Walter I. Widemann T. Viewed from Orbit with Six-Window Marcq E. Ferrari S. D’Amore M. VNIR Spectroscopy [#8015] Muller N. Smrekar S. Iron oxidation and changes in mineralogy due to surface/atmosphere interactions can be detected from orbit using a six-window orbital spectrometer. 9:30 a.m. Knicely J. J. * Herrick R. R. Atmospheric Windows to Image the Surface from Beneath the Cloud Deck on the Night Side of Venus [#8019] We explore possible atmospheric windows beneath the cloud deck to study the surface of the night side Venus. Numerous possible windows were found with the potential to elucidate questions about the composition and redox state of the surface of Venus. 9:45 a.m. Ghail R. C. * Byrne P. K. Mason P. J. Towards a New Understanding of Venus [#8013] In recent years there has been a convergence of ideas and observations that show Venus to be both more complex and active than previously thought. Here we review how a range of different processes contribute to the present-day appearance of Venus. 10:00 a.m. Byrne P. K. * Ghail R. C. A Globally Fragmented and Mobile Lithosphere Sengör A. M. C. James P. B. on Venus [#8008] Klimczak C. Solomon S. C. We report observations in support of a continuum of lithospheric mobility, with Earth’s “mobile lid” tectonics at one end, the “stagnant lid” tectonics of Mercury, Mars, and the Moon at the other, and Venus somewhere in between. 10:15 a.m. Goossens S. * Mazarico E. Venus Gravity Field Determination Using Rosenblatt P. Lebonnois S. Lemoine F. Magellan and Venus Express Tracking Data [#8029] We present an updated gravity field model for Venus from Magellan and Venus Express data. We focus on extending the temporal baseline to determine Venus’ Love number and rotational parameters, and the effects of the atmosphere on these parameters. 10:30 a.m. Break Wednesday, November 7, 2018 VENUS ASTROBIOLOGY AND EXOPLANETS 10:45 a.m. Bldg. 200, Room 100 Chair: Giada Arney Times Authors (* Denotes Speaker) Abstract Title and Summary 10:45 a.m. Limaye S. S. * Mogul R. Jessup K. L. An Astrobiology Aspect for Exploring Gregg T. Pertzborn R. Ocampo A. Venus Clouds [#8051] Lee Y. J. Bullock M. A. Grinspoon D. Possibility of life in the habitable zone in the cloud layer on Venus cannot be excluded from available measurements. It has been suggested that microorganisms may contribute to contrasts and albedo of Venus, making this an exploration objective. 11:00 a.m. Arney G. N. * Venus: The Exoplanet Laboratory Next Door [#8005] We review what present and past Venus teaches us context of comparative planetology and processes that shape habitability and biosignature “false positives” in exoplanet atmospheres. Venus plays a vital role in helping us understand exoplanets. 11:15 a.m. Kane S. R. * Arney G. Crisp D. Venus: The Nearby Domagal-Goldman S. Glaze L. S. Exoplanetary Laboratory [#8047] Goldblatt C. Grinspoon D. Head J. W. In this talk I will present the current state of Lenardic A. Unterborn C. Way M. J. detecting potential Venus analogs, expected yield from current exoplanet missions, and summarize the primary exoplanet science questions that would be addressed by a return surface mission to Venus. 11:30 a.m. Smrekar S. E. * Davaille A. Venus Geodynamics, Habitability, and Initiation of Subduction [#8036] Earth’s plate tectonics drives volcanism, tectonism, outgassing and recycling of volatiles, surface weathering, and potentially a core dynamo, all of which strongly influence long term habitability.
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    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 97, NO. El0, PAGES 16,085-16,120, OCTOBER 25, 1992 Stylesof Deformationin IshtarTerra and Their Implications Wn.T.TAMM. KAU•A,• DOAN•L. BINDSCHAD•-R,l ROBERT E. GPaM•,2'3 VICKIL. HANSEN,2KARl M. ROBERTS,4AND SUZANNE E. SMREr,AR s IshtarTerra, the highest region on Venus, appears to havecharacteristics of both plume uplifts and convergent belts.Magellan imagery over longitudes 330ø-30øE indicates a great variety of tectonicand volcanic activity, with largevariations within distances of onlya few 100km. Themost prominent terrain types are the volcanic plains of Lakshmiand the mountain belts of Maxwell,Freyja, and Danu. Thebelts appear to havemarked variations in age. Thereare also extensive regions of tesserain boththe upland and outboard plateaus, some rather featureless smoothscarps, flanking basins of complexextensional tectonics, and regions of gravitationalor impactmodifica- tion.Parts of Ishtarare the locations of contemporaryvigorous tectonics and past extensive volcanism. Ishtar appearsto be the consequence of a history of several100 m.y., in whichthere have been marked changes in kinematic patternsand in whichactivity at any stage has been strongly influenced by the past. Ishtar demonstrates three general propertiesof Venus:(1) erosionaldegradation is absent,leading to preservationof patternsresulting from past activity;(2) manysurface features are the responses ofa competentlayer less than 10 km thick to flowsof 100km orbroaderscale; and (3) thesebroader scale flows are controlled mainly by heterogeneities inthe mantle. Ishtar Terra doesnot appear to bethe result of a compressionconveyed by anEarthlike lithosphere. But there is stilldoubt as to whetherIshtar is predominantlythe consequence of a mantleupflow or downflow.Upflow is favoredby the extensivevolcanic plain of Lakshmiand the high geoid: topography ratio; downflow is favoredby the intense deformationof themountain belts and the absence of majorrifts.
  • Title Spons Agency Bureau No Pub Date Contract Note

    Title Spons Agency Bureau No Pub Date Contract Note

    DOCUMENT LIZSUME ED 071' C87 82 015 524 TITLE Project Musics Reader 2,Motion in the Heavens. .INSTITUTION Harvard Univ., Cambridge,Mass. Harvard Project _Physics. SPONS AGENCY Office of Education (DREW), Washington, D.C.,Bureau of Research. BUREAU NO BK-5-1038 PUB DATE 68 CONTRACT 08C-5-10-058 NOTE 233p.; Authorized InterimVersion EDRS PRICE MF -$0.65 HC-89.87 _DESCRIPTORS Astronomy; Instructional Materials;.*Motion; *Physics; Science, Fiction;. Science Materials; _Secondary Grades; *Secondary School Science; *Space; *Supplementary Reading Materials IDENTIFIER'S Harvard Project Physics ABSTRACT As a supplement to.Projpct Physics Unit 2, specially, selected articles are presented in this reader for student browsing. _Eight excerpts are given under headings:,the starry messenger, Newton_. And the principia, an appreciation of the earth, space the unconquerable, Is there intelligent life beyond the earth3,11 the life story of a galaxy, expansion of the universe, and Dyson sphere. Seven book passages. are included under. the, headings of the black cloud, roll call, a night at the observatory, Repler's celestial music, universal gravitation, a table of stars within twenty-two light years that could have habitable planets, and three poetic _fragments about astronomy. The remaining articles includea preface to the books of the ,revolutions, Kepler, Kepler on. Mars, laws of ..motion and proposition one,, garden of Epicurus, a search for life on earth at Kilometer resolution, the. boy who redeemed his father's _name, great comet of 1965, gravity experiments, unidentified flying objects, and negative mass. Illustrations for explanationpurposes . are provided. The work of Harvard. Project Physics has been .financially supported by: the Carnegie Corporation of New York, the Ford.