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The spatial distribution and polarization of Saturn narrowband (NB) emissionshave been studied by using Cassini Radio and Plasma Wave Sciences data andgoniopolarimetric data obtained through an inversion algorithm with a presetsource located at the center of Saturn. From 2004 January 1 to 2017 September12, NB emissions were selected automatically by a computer program andrechecked manually. The spatial distribution shows a preference for highlatitude and intensity peaks in the region within 6 Saturn radii for both 5 and20 kHz NB emissions. 5 kHz NB emissions also show a local time preferenceroughly in the 18:00-22:00 sector. The Enceladus plasma torus makes itdifficult for NB emissions to propagate to the low latitude regions outside theplasma torus. The extent of the low latitude regions where 5 and 20 kHz NBemissions were never observed is consistent with the corresponding plasma torusdensity contour in the meridional plane. 20 kHz NB emissions show a highcircular polarization while 5 kHz NB emissions are less circularly polarizedwith |V|<0.6 for majority of the cases. And cases of 5kHz NB emissions withhigh circular polarization are more frequently observed at high latitudeespecially at the northern and southern edges of the Enceladus plasma torus.

Statistical Study on Spatial Distribution and Polarization of Saturn Narrowband Emissions