J
Joseph Westlake
Researcher at Johns Hopkins University Applied Physics Laboratory
Publications - 95
Citations - 3481
Joseph Westlake is an academic researcher from Johns Hopkins University Applied Physics Laboratory. The author has contributed to research in topics: Titan (rocket family) & Magnetosphere. The author has an hindex of 25, co-authored 93 publications receiving 2778 citations. Previous affiliations of Joseph Westlake include Johns Hopkins University & Southwest Research Institute.
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Journal ArticleDOI
The process of tholin formation in Titan's upper atmosphere.
J. H. Waite,D. T. Young,Thomas E. Cravens,Andrew J. Coates,F. J. Crary,Brian Magee,Joseph Westlake +6 more
TL;DR: Evidence is obtained for tholin formation at high altitudes (∼1000 kilometers) in Titan's atmosphere using measurements from a combination of mass/charge and energy/charge spectrometers on the Cassini spacecraft.
Journal ArticleDOI
Liquid water on Enceladus from observations of ammonia and 40Ar in the plume
J. H. Waite,W. S. Lewis,Brian Magee,Jonathan I. Lunine,William B. McKinnon,Christopher R. Glein,Olivier Mousis,Olivier Mousis,D. T. Young,Tim Brockwell,Joseph Westlake,M. J. Nguyen,B. D. Teolis,Hasso B. Niemann,Ralph L. McNutt,Mark E. Perry,Wing-Huen Ip +16 more
TL;DR: McKinnon et al. as mentioned in this paper reported that ammonia is present in the plume, along with various organic compounds, deuterium and, very probably, Ar-40, which provides strong evidence for the existence of at least some liquid water, given that temperatures in excess of 180 K have been measured near the fractures from which the jets emanate.
Journal ArticleDOI
The Space Physics Environment Data Analysis System (SPEDAS)
Vassilis Angelopoulos,P. Cruce,Alexander Drozdov,Eric Grimes,N. Hatzigeorgiu,D. A. King,Davin Larson,James W. Lewis,J. M. McTiernan,D. A. Roberts,C. L. Russell,Tomoaki Hori,Yoshiya Kasahara,Atsushi Kumamoto,Ayako Matsuoka,Yukinaga Miyashita,Yoshizumi Miyoshi,I. Shinohara,Mariko Teramoto,Jeremy Faden,Alexa Halford,Matthew D. McCarthy,Robyn Millan,John Sample,David M. Smith,L. A. Woodger,Arnaud Masson,A. A. Narock,Kazushi Asamura,T. F. Chang,C. Y. Chiang,Yoichi Kazama,Kunihiro Keika,S. Matsuda,Tomonori Segawa,Kanako Seki,Masafumi Shoji,Sunny W. Y. Tam,Norio Umemura,B. J. Wang,B. J. Wang,Shiang-Yu Wang,Robert J. Redmon,Juan V. Rodriguez,Juan V. Rodriguez,Howard J. Singer,Jon Vandegriff,S. Abe,Masahito Nose,Masahito Nose,Atsuki Shinbori,Yoshimasa Tanaka,S. UeNo,L. Andersson,P. Dunn,Christopher M. Fowler,Jasper Halekas,Takuya Hara,Yuki Harada,Christina O. Lee,Robert Lillis,David L. Mitchell,Matthew R. Argall,Kenneth R. Bromund,James L. Burch,Ian J. Cohen,Michael Galloy,Barbara L. Giles,Allison Jaynes,O. Le Contel,Mitsuo Oka,T. D. Phan,Brian Walsh,Joseph Westlake,Frederick Wilder,Stuart D. Bale,Roberto Livi,Marc Pulupa,Phyllis Whittlesey,A. DeWolfe,Bryan Harter,E. Lucas,U. Auster,John W. Bonnell,Christopher Cully,Eric Donovan,Robert E. Ergun,Harald U. Frey,Brian Jackel,A. Keiling,Haje Korth,J. P. McFadden,Yukitoshi Nishimura,Ferdinand Plaschke,P. Robert,Drew Turner,James M. Weygand,Robert M. Candey,R. C. Johnson,T. Kovalick,M. H. Liu,R. E. McGuire,Aaron Breneman,Kris Kersten,P. Schroeder +104 more
TL;DR: The SPEDAS development history, goals, and current implementation are reviewed, and its “modes of use” are explained with examples geared for users and its technical implementation and requirements with software developers in mind are outlined.
Journal ArticleDOI
INMS-derived composition of Titan's upper atmosphere: Analysis methods and model comparison
TL;DR: In this article, an analysis of the data observed by INMS during these encounters was presented to derive the neutral composition of Titan's upper atmosphere between 1000 and 1100 km. Analysis methods were described for the determination and correction of instrument effects as well as the composition derivation processes.
Journal ArticleDOI
Heavy ions, temperatures and winds in Titan's ionosphere: Combined Cassini CAPS and INMS observations
TL;DR: In this paper, the authors used data from two Cassini instruments, the Cassini plasma spectrometer's ion beam sensor (CAPS/IBS) and the ion and neutral mass spectrometers (INMS) during fourteen Cassini encounters with Titan's upper atmosphere.