气候变化领域集成服务门户(CCPortal): Juno In Situ Observations Above the Jovian Equatorial Ionosphere

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DOI	10.1029/2020GL087623
	Juno In Situ Observations Above the Jovian Equatorial Ionosphere
	Valek P.W.; Bagenal F.; Ebert R.W.; Allegrini F.; McComas D.J.; Szalay J.R.; Wilson R.J.; Bolton S.J.; Connerney J.E.P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	The arrival of Juno at Jupiter enables repeated in situ observations above the Jovian ionosphere. The low altitude and high velocity of Juno at perijove permits direct sampling of ionospheric ion populations. We present the first direct observations above the ionosphere made by the Jovian Auroral Distributions Experiment Ion sensor (JADE-I). When looking into the spacecraft ram direction, JADE-I can measure ion energy distributions to below 1 eV/q along with ion composition. We report observations from 17 Juno perijove passes. At these latitudes, the low energy ions consist of protons and heavier ions, protons being the dominant species. Heavy ions—primarily oxygen and sulfur likely originating from the magnetosphere—are seen each pass, but their intensity varies. Other trace light ions are observed during some of the perijoves: H3+ (6 of 17 perijoves), He+ (2 of 17 perijoves). Ionospheric ions are observed up to altitudes of ~7,000 km. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Heavy ions; Ionosphere; Magnetosphere; Silicate minerals; Direct observations; Direct sampling; Dominant species; Equatorial ionosphere; In-situ observations; Ion energy distributions; Low energy ions; Oxygen and sulfurs; Ionospheric measurement; aurora; energy budget; in situ measurement; ion; ionosphere; Jupiter; oxygen; planetary atmosphere; spacecraft; sulfur
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170209
作者单位	Southwest Research Institute, San Antonio, TX, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, United States; Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States; Space Research Corporation, Annapolis, MD, United States; Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Valek P.W.,Bagenal F.,Ebert R.W.,et al. Juno In Situ Observations Above the Jovian Equatorial Ionosphere[J],2020,47(12).
APA	Valek P.W..,Bagenal F..,Ebert R.W..,Allegrini F..,McComas D.J..,...&Connerney J.E.P..(2020).Juno In Situ Observations Above the Jovian Equatorial Ionosphere.Geophysical Research Letters,47(12).
MLA	Valek P.W.,et al."Juno In Situ Observations Above the Jovian Equatorial Ionosphere".Geophysical Research Letters 47.12(2020).