Phase relations between energetic neutral atom intensities and kilometric radio emissions at Saturn

Details Phase relations between energetic neutral atom intensities and kilometric radio emissions at Saturn Phase relations between energetic neutral atom intensities and kilometric radio emissions at Saturn

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11501203c&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue A1, CiteID A01203

Physics

4

Planetary Sciences: Fluid Planets: Magnetospheres (2756), Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Ring Current, Ionosphere: Plasma Waves And Instabilities (2772)

Scientific paper

The intensities of energetic neutral atoms (ENAs) from Saturn's ring current were cross-correlated with Saturn kilometric radiation (SKR, 100-400 kHz) to determine their phase relations. The cross correlations were obtained for three intervals in early 2007 when Cassini was at high northern latitudes and the Ion and Neutral Camera (INCA) could optimally view the entire ring current. During these intervals, the hydrogen, oxygen, and SKR signals all exhibited ˜10.8 h periodicities. A consistent phase relation was not observed between the ENA and the SKR. Cross-correlation amplitudes in these intervals varied from 0.25 to 0.79, and the phase offsets varied from ˜1 h to several hours and differed according to ENA species. Not only did the SKR and ENA signal show phase offsets, but the H and O signals also displayed offsets. That is, all periodicities at ˜10.8 h had no consistent synchronization.

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