EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Callisto's atmosphere and its space environment: prospects for the Particle Environment Package on board JUICE

André Galli1, Audrey Vorburger1, Shane R. Carberry Mogan1,2, Elias Roussos3, Gabriella Stenberg Wieser4, Peter Wurz1, Martina Föhn1, Norbert Krupp3, Markus Fränz3, Stas Barabash4, Yoshifumi Futaana4, Pontus C. Brandt5, Peter Kollmann5, Dennis Haggerty5, Geraint H. Jones6, Robert E. Johnson7, Orenthal J. Tucker8, Sven Simon9, Tyler Tippens9, and Lucas Liuzzo10
André Galli et al.
  • 1Space Research and Planetary Science, University of Bern, Bern, Switzerland (
  • 2Center for Space Science, NYU Abu Dhabi, UAE
  • 3Max Planck Institute for Solar System Research, Göttingen, Germany
  • 4Swedish Institute of Space Physics, Kiruna, Sweden
  • 5Johns Hopkins University, Baltimore, USA
  • 6Mullard Space Science Laboratory, University College London, UK
  • 7University of Virginia, Charlottesville, USA
  • 8NASA Goddard Space Flight Center, Greenbelt, USA
  • 9School of Earth & Atmospheric Sciences, Georgia Institute of Technology, Atlanta, USA
  • 10Space Sciences Laboratory, University of California, Berkeley, USA

The JUpiter ICy moons Explorer (JUICE) of the European Space Agency will investigate Jupiter and its icy moons Europa, Ganymede, and Callisto, with the aim to better understand the origin and evolution of our Solar System and the emergence of habitable worlds around gas giants. The Particle Environment Package (PEP) on JUICE is designed to measure neutrals and ions and electrons at thermal, suprathermal, and radiation belt energies (eV to MeV). 

In the vicinity of Callisto, PEP will characterize the plasma environment, the outer parts of Callisto's atmosphere and ionosphere and their interaction with Jupiter's dynamic magnetosphere. About 20 Callisto flybys with closest approaches between 200 km and 5000 km altitude are
planned over the course of the JUICE mission. In this presentation, we review the state of knowledge regarding Callisto's ambient environment and magnetospheric interaction with recent modeling efforts for Callisto's atmosphere and ionosphere to identify science opportunities for the PEP observations and to optimize scientific insight gained from the foreseen JUICE flybys. These considerations inform science operation planning of PEP and JUICE and they will guide future model development for the atmosphere and ionosphere of Callisto and their interactions with the plasma environment.

How to cite: Galli, A., Vorburger, A., Carberry Mogan, S. R., Roussos, E., Stenberg Wieser, G., Wurz, P., Föhn, M., Krupp, N., Fränz, M., Barabash, S., Futaana, Y., Brandt, P. C., Kollmann, P., Haggerty, D., Jones, G. H., Johnson, R. E., Tucker, O. J., Simon, S., Tippens, T., and Liuzzo, L.: Callisto's atmosphere and its space environment: prospects for the Particle Environment Package on board JUICE, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-1348,, 2022.


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