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Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....11355b&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #11355
Other
Scientific paper
In 1983, Divine and Garrett presented a model of charged particle distribution, between 1 eV and several MeV, in Jupiter magnetosphere. This model is based primarily on a few scattered in situ measurements returned by experiments on the Pioneer and Voyager spacecraft. More recently, new in-situ measurements acquire with new experiments like GALILEO EPD, and many other observations like synchrotron emission, for example, are available and are not taken into account in this model. On the other side, there is a physical model of Jovian electron radiation belts: Salammbo-3D (see the other abstract of the same authors in the same session). It is valid in the L range 1-9.5 and for energies included between a few hundreds of keV to several hundreds of MeV. Salammbo-3D is based on the understanding of major physical processes playing an important role in the Jovian trapped electron dynamics (moons, rings, synchrotron, etc.). This model is now mature enough to get very good agreement between simulations and observations (Pioneer, synchrotron observations). All elements are here to propose an updated Jovian electron belt model, JEREMI (Jovian Electron Radiation Environment for Mission Investigation). This is done by combining the two approaches described previously: - When Salammbo-3D is valid (in term of L range and energy range) it is considered in priority. - Otherwise the old Divine and Garrett model will be considered. In order to appreciate the progress with the JEREMI model, comparisons with in-flight measurements (Pioneer, Galileo) and with synchrotron observations (VLA) will be given considering JEREMI or Divine and Garrett models. Finally, flux estimation along a Jupiter Polar orbiter will be given with the two models.
Bourdarie Sebastien
Sicard Andrés
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