DOI: 10.1002/2015GL063224
论文题名: Simulated recovery of Europa's global shape and tidal Love numbers from altimetry and radio tracking during a dedicated flyby tour
作者: Mazarico E. ; Genova A. ; Neumann G.A. ; Smith D.E. ; Zuber M.T.
刊名: Geophysical Research Letters
ISSN: 0094-9459
EISSN: 1944-9190
出版年: 2015
卷: 42, 期: 9 起始页码: 3166
结束页码: 3173
语种: 英语
英文关键词: altimetry
; Europa
; flyby
; gravity
; tide
Scopus关键词: Aneroid altimeters
; Gravitation
; Liquids
; Spacecraft
; Tides
; Altimetry
; Europa
; Flyby
; Future spacecraft
; Interior structure
; Laser altimeter
; Scientific objectives
; Sub-surface ocean
; Glacial geology
; altimetry
; geophysical method
; Jupiter
; Moon
; simulation
; spacecraft
英文摘要: The fundamental scientific objectives for future spacecraft exploration of Jupiter's moon Europa include confirmation of the existence of subsurface ocean beneath the surface ice shell and constraints on the physical properties of the ocean. Here we conduct a comprehensive simulation of a multiple-flyby mission. We demonstrate that radio tracking data can provide an estimate of the gravitational tidal Love number k2 with sufficient precision to confirm the presence of a liquid layer. We further show that a capable long-range laser altimeter can improve determination of the spacecraft position, improve the k2 determination (<1% error), and enable the estimation of the planetary shape and Love number h2 (3-4% error), which is directly related to the amplitude of the surface tidal deformation. These measurements, in addition to the global shape accurately constrained by the long altimetric profiles, can yield further constraints on the interior structure of Europa. Key Points A multiple-flyby mission to Europa can recover key geophysical parameters Laser altimetry can uniquely and accurately recover the global shape of Europa Laser altimetry enables the recovery of h2 to constrain the ice shell thickness ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930482122&doi=10.1002%2f2015GL063224&partnerID=40&md5=5e15bf410c37f8309e23d078300957c7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9074
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Mazarico E.,Genova A.,Neumann G.A.,et al. Simulated recovery of Europa's global shape and tidal Love numbers from altimetry and radio tracking during a dedicated flyby tour[J]. Geophysical Research Letters,2015-01-01,42(9).