Journal ArticleDOI
Formulation of a wind specification for Titan late polar summer exploration
Ralph D. Lorenz,Claire Newman,Tetsuya Tokano,Jonathan L. Mitchell,Benjamin Charnay,Sébastien Lebonnois,Richard K. Achterberg +6 more
TLDR
In this paper, the authors present a simple analytical formulation of expected, minimum and maximum winds as a function of altitude to aid spacecraft and instrument design for future exploration, with particular reference to the descent dispersions of the Titan Mare Explorer (TiME) mission concept.About:
This article is published in Planetary and Space Science.The article was published on 2012-09-01. It has received 36 citations till now. The article focuses on the topics: Wind speed & Titan (rocket family).read more
Citations
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Dune Worlds: How Windblown Sand Shapes Planetary Landscapes
TL;DR: In this article, Dune Trafficability - soil mechanics, effects on mobility on Earth, Mars and elsewhere has been studied in the field of field studies and computer models, with an emphasis on the effects of dune trafficability on mobility.
Journal ArticleDOI
Surface Temperatures on Titan During Northern Winter and Spring
D. E. Jennings,V. Cottini,V. Cottini,Conor A. Nixon,R. K. Achterberg,R. K. Achterberg,F. M. Flasar,Virgil G. Kunde,Paul N. Romani,Robert E. Samuelson,Robert E. Samuelson,A. A. Mamoutkine,N. Gorius,Athena Coustenis,Tetsuya Tokano +14 more
TL;DR: For instance, during the 2004-2014 portion of the Cassini mission, the Composite Infrared Spectrometer (CIS) was used to measure the relative brightness of the surface of Titan as discussed by the authors.
Proceedings ArticleDOI
TiME - The Titan Mare Explorer
Ellen R. Stofan,Ralph D. Lorenz,Jonathan I. Lunine,E. B. Bierhaus,B. C. Clark,Paul R. Mahaffy,M. A. Ravine +6 more
TL;DR: The Titan Mare Explorer (TiME) is a Discovery-class mission concept that underwent a detailed Phase A study in 2011-2012 as discussed by the authors, and the mission would splashdown a capsule on Titan's ethane sea Ligeia Mare as early as the summer of 2023.
Journal ArticleDOI
A model intercomparison of Titan's climate and low-latitude environment
Juan M. Lora,Juan M. Lora,Tetsuya Tokano,Jan Vatant d'Ollone,Sébastien Lebonnois,Ralph D. Lorenz +5 more
TL;DR: In this paper, the authors compare three three-dimensional general circulation models (GCMs) to each other and to in situ observations, and also provide multi-model expectations for the low-latitude environment during the early northern winter season.
Journal ArticleDOI
Selection and Characteristics of the Dragonfly Landing Site near Selk Crater, Titan
Ralph D. Lorenz,Shannon MacKenzie,Catherine D. Neish,Catherine D. Neish,Alice Le Gall,Elizabeth P. Turtle,Jason W. Barnes,Melissa G. Trainer,Alyssa Werynski,J. E. Hedgepeth,Erich Karkoschka +10 more
TL;DR: In this paper, the Dragonfly landing site for the first landing on Titan was selected based on arrival geometry and aerodynamic/aerothermodynamic considerations, illumination and Earth visibility, as well as the likely presence of exposed deposits of water-rich material.
References
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Journal ArticleDOI
Rain, winds and haze during the Huygens probe's descent to Titan's surface
Martin G. Tomasko,Brent A. Archinal,Tammy L. Becker,Bruno Bézard,M. Bushroe,M. Combes,D. Cook,Athena Coustenis,C. de Bergh,L. E. Dafoe,Lyn R. Doose,Sylvain Douté,A. Eibl,S. Engel,Fritz Gliem,B. Grieger,K. Holso,Elpitha Howington-Kraus,Erich Karkoschka,H. U. Keller,Randolph L. Kirk,R. Kramm,Michael Küppers,Peter Lanagan,E. Lellouch,Mark T. Lemmon,Jonathan I. Lunine,Jonathan I. Lunine,Elisabeth A. McFarlane,John E. Moores,G. M. Prout,Bashar Rizk,Mark R. Rosiek,P. Rueffer,Stefan Schröder,Bernard Schmitt,C. See,Paul S. Smith,Laurence A. Soderblom,Nicolas Thomas,Robert West +40 more
TL;DR: Spectra and high-resolution images obtained by the Huygens Probe Descent Imager/Spectral Radiometer instrument in Titan's atmosphere reveal the traces of once flowing liquid, and like Earth, the brighter highland regions show complex systems draining into flat, dark lowlands.
Journal ArticleDOI
The lakes of Titan
Ellen R. Stofan,Charles Elachi,Jonathan I. Lunine,R. D. Lorenz,Bryan Stiles,Karl L. Mitchell,Steven J. Ostro,Laurence A. Soderblom,Charles A. Wood,Howard A. Zebker,S. D. Wall,Michael Janssen,Randolph L. Kirk,Rosaly M. C. Lopes,Flora Paganelli,Jani Radebaugh,Lauren Wye,Y. Anderson,Matthew A. Allison,R. Boehmer,Philip S. Callahan,Pierre Encrenaz,E. Flamini,G. Francescetti,Yonggyu Gim,G. Hamilton,S. Hensley,William T. K. Johnson,K. Kelleher,Duane O. Muhleman,P. Paillou,Giovanni Picardi,Francesco Posa,L. Roth,Roberto Seu,S. Shaffer,S. Vetrella,Robert West +37 more
TL;DR: These northern-hemisphere lakes constitute the strongest evidence yet that a condensable-liquid hydrological cycle is active in Titan’s surface and atmosphere, in which the lakes are filled through rainfall and/or intersection with the subsurface ‘liquid methane’ table.
Journal ArticleDOI
Imaging of Titan from the Cassini spacecraft
Carolyn C. Porco,E. Baker,J. Barbara,K. Beurle,André Brahic,Joseph A. Burns,Sébastien Charnoz,Nicholas J. Cooper,D. D. Dawson,Anthony D. Del Genio,Tilmann Denk,Luke Dones,Ulyana A. Dyudina,Michael W. Evans,S. Fussner,Bernd Giese,Kevin R. Grazier,Paul Helfenstein,Andrew P. Ingersoll,Robert A. Jacobson,Torrence V. Johnson,Alfred S. McEwen,Carl D. Murray,Gerhard Neukum,William M. Owen,Jason Perry,Thomas Roatsch,Joseph N. Spitale,Steven W. Squyres,Peter C. Thomas,Matthew S. Tiscareno,Elizabeth P. Turtle,Ashwin R. Vasavada,Joseph Veverka,Roland Wagner,Robert West +35 more
TL;DR: Observations of Titan from the imaging science experiment onboard the Cassini spacecraft reveal intricate surface albedo features that suggest aeolian, tectonic and fluvial processes, and imply that substantial surface modification has occurred over Titan's history.
Journal ArticleDOI
Determining the power-law wind-profile exponent under near-neutral stability conditions at sea
TL;DR: In this article, the mean and standard deviation for the exponent of the power-law wind profile over the ocean under near-neutral atmospheric stability conditions were determined to be 0.11 ± 0.03.
Journal ArticleDOI
Titan's atmospheric temperatures, winds, and composition
F. M. Flasar,R. K. Achterberg,Barney J. Conrath,Peter J. Gierasch,V. G. Kunde,Conor A. Nixon,Gordon L. Bjoraker,D. E. Jennings,Paul N. Romani,Amy A. Simon-Miller,Bruno Bézard,Athena Coustenis,Pgj Irwin,Nicholas A Teanby,John C. Brasunas,John C. Pearl,M. E. Segura,Ronald Carlson,A. A. Mamoutkine,Paul J. Schinder,Antonella Barucci,Regis Courtin,Thierry Fouchet,Daniel Gautier,Emmanuel Lellouch,A. Marten,R. Prangé,Sandrine Vinatier,Darrell F. Strobel,S. B. Calcutt,Peter L. Read,Fredric W. Taylor,Neil Bowles,Robert E. Samuelson,Glenn S. Orton,Linda Spilker,Tobias Owen,John R. Spencer,Mark R. Showalter,C. Ferrari,Mian M. Abbas,François Raulin,Scott G. Edgington,Peter A. R. Ade,E. H. Wishnow +44 more
TL;DR: Early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15°S), and the concentrations of several stratospheric organic compounds are enhanced at mid- and high northern latitudes, and the strong zonal winds may inhibit mixing between these latitudes and the rest of Titan.