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| Titel |
Jupiter Icy Moons Explorer: mission status after the Definition Phase |
| VerfasserIn |
Dmitri Titov, Stas Barabash, Lorenzo Bruzzone, Michele Dougherty, Christian Erd, Leigh Fletcher, Philippe Gare, Randall Gladstone, Olivier Grasset, Leonid Gurvits, Paul Hartogh, Hauke Hussmann, Luciano Iess, Ralf Jaumann  , Yves Langevin, Pasquale Palumbo, Giuseppe Piccioni, Giuseppe Sarri, Jan-Erik Wahlund, Olivier Witasse |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250113087
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| Publikation (Nr.) |
 EGU/EGU2015-13284.pdf |
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| Zusammenfassung |
| JUpiter ICy moons Explorer (JUICE), the ESA first large-class mission within the Cosmic
Vision Program 2015-2025, was adopted in November 2014. The mission will perform
detailed investigations of Jupiter and its system with particular emphasis on Ganymede as a
planetary body and potential habitat. The overarching theme for JUICE is: The emergence of
habitable worlds around gas giants. At Ganymede, the mission will characterize in detail the
ocean layers; provide topographical, geological and compositional mapping of the surface;
study the physical properties of the icy crusts; characterize the internal mass distribution,
investigate the exosphere; study Ganymede’s intrinsic magnetic field and its interactions with
the Jovian magnetosphere. For Europa, the focus will be on the non-ice chemistry,
understanding the formation of surface features and subsurface sounding of the icy crust over
recently active regions. Callisto will be explored as a witness of the early solar
system.
JUICE will perform a multidisciplinary investigation of the Jupiter system as an
archetype for gas giants. The circulation, meteorology, chemistry and structure of the Jovian
atmosphere will be studied from the cloud tops to the thermosphere. The focus in Jupiter’s
magnetosphere will include an investigation of the three dimensional properties of the
magnetodisc and in-depth study of the coupling processes within the magnetosphere,
ionosphere and thermosphere. Aurora and radio emissions will be elucidated. JUICE will
study the moons’ interactions with the magnetosphere, gravitational coupling and long-term
tidal evolution of the Galilean satellites.
JUICE highly capable scientific payload includes 10 state-of-the-art instruments onboard
the spacecraft plus one experiment that uses the spacecraft telecommunication system with
ground-based radio telescopes. The remote sensing package includes a high-resolution
multi-band visible imager (JANUS) and spectro-imaging capabilities from the ultraviolet to
the sub-millimetre wavelengths (MAJIS, UVS, SWI). A geophysical package consists of
a laser altimeter (GALA) and a radar sounder (RIME) for exploring the surface
and subsurface of the moons, and a radio science experiment (3GM) to probe the
atmospheres of Jupiter and its satellites and to perform measurements of the gravity fields.
An in situ package comprises a powerful particle environment package (PEP), a
magnetometer (J-MAG) and a radio and plasma wave instrument (RPWI), including electric
fields sensors and a Langmuir probe. An experiment (PRIDE) using ground-based
Very-Long-Baseline Interferometry (VLBI) will provide precise determination of the moons
ephemerides.
The mission scenario will include a Jovian tour with multiple flybys of Callisto and
Ganymede, the phase with more than 20 degrees inclination orbits, and two Europa flybys.
The Ganymede tour will include high (5000 km) and low (500 km) almost polar orbits around
the moon. The mission scenario has evolved slightly during the definition phase, reassuring
that the mission will still be able to fulfil all major science objectives. The talk will give an
overview of the mission status at the end of the definition phase, focusing on the
evolution of science performance and payload synergies in achieving the mission goals. |
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