ELLIPTICALLY POLARIZED BURSTY RADIO EMISSIONS FROM JUPITER

We report a new component of Jovian radio emission observed by the Uly sses spacecraft when Ulysses was at high Jovigraphic latitudes (greate r-than-or-similar-to 30-degrees north or south of the Jovian magnetic equator). This bursty high-latitude emission is elliptically polarized in the right-hand sense when observed from northern latitudes and in the left-hand sense when observed from southern latitudes, consistent with extra-ordinary mode. The orientation of the polarization ellipse is observed to systematically vary with time relative to the observer. It is argued that the elliptically-polarized nature of the emission i s intrinsic to the source region.