Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23c1630c&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM23C-1630
Physics
[2704] Magnetospheric Physics / Auroral Phenomena
Scientific paper
The SKR (Saturn Kilometric Radiation) is the main radio component at Saturn. Their auroral origin was discovered in the Voyager era and was confirmed and studied in detail with the Cassini/RPWS (Radio and Plasma Wave Science) experiment. The goniopolarimetric (GP) capabilities of the High Frequency Receiver (HFR) allows to instantaneously determine the flux, the polarization and the wave vector direction of any observed transverse electromagnetic wave. Provided a magnetic field model and assuming the emission to be emitted close to the local electron cyclotron frequency, one can then localize the SKR sources as well as the apparent beaming pattern of the source, which is the combination of the intrinsic source emission pattern and of propagation effects occurring along the wave path between the source and the observer. It was discovered recently that the polarization of the SKR changes with observational latitude. We present these results and discuss them. We also present new result on the source beaming pattern. These observed properties will be compared to that of the terrestrial and jovian auroral radio emissions.
Cecconi Baptiste
Fischer Guntram
Hess Sebastian
Lamy Laurent
Prangé Renee
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