Ion escape at Mars: Comparison of a 3-D hybrid simulation with Mars Express IMA/ASPERA-3 measurements

E. Kallio*, A. Fedorov, E. Budnik, T. Säles, P. Janhunen, W. Schmidt, H. Koskinen, P. Riihelä, S. Barabash, R. Lundin, M. Holmström, H. Gunell, K. Brinkfeldt, Y. Futaana, H. Andersson, M. Yamauchi, A. Grigoriev, J. A. Sauvaud, J. J. Thocaven, J. D. WinninghamR. A. Frahm, J. R. Sharber, J. R. Scherrer, A. J. Coates, D. R. Linder, D. O. Kataria, J. Kozyra, J. G. Luhmann, E. Roelof, D. Williams, S. Livi, C. C. Curtis, K. C. Hsieh, B. R. Sandel, M. Grande, M. Carter, S. McKenna-Lawler, S. Orsini, R. Cerulli-Irelli, M. Maggi, P. Wurz, P. Bochsler, N. Krupp, J. Woch, M. Fränz, K. Asamura, C. Dierker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (SciVal)


We have analysed ion escape at Mars by comparing ASPERA-3/Mars Express ion measurements and a 3-D quasi-neutral hybrid model. As Mars Express does not have a magnetometer onboard, the analysed IMA data are from an orbit when the IMF clock angle was possible to determine from the magnetic field measurements of Mars Global Surveyor. We found that fast escaping planetary ions were observed at the place which, according to the 3-D model, is anticipated to contain accelerated heavy ions originating from the martian ionosphere. The direction of the interplanetary magnetic field was found to affect noticeably which regions can be magnetically connected to Mars Express and to the overall 3-D Mars-solar wind interaction.

Original languageEnglish
Pages (from-to)350-359
Number of pages10
Issue number2
Publication statusPublished - Jun 2006


  • atmosphere
  • Ionospheres
  • Mars


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