Jupiter and other planets

Each of the planets with an internal magnetic field produces a magnetosphere which surrounds the planet and deflects the solar wind around it. Typically, these magnetospheres are sources of a variety of radio emissions, produced by the energetic electrons that are trapped in the magnetic fields. Ulysses has observed radio emissions from Jupiter, Saturn, and the Earth; of these three planets, Jupiter has by far the most varied population of radio emissions. Analysis of the Jovian radio bursts by Ulysses was greatly enhanced by the close flyb-by of the planet. Ulysses passed within 6 Jovian radii of Jupiter (about 420,000 km) on February 8, 1992 (see image below). Inside the Jovian magnetosphere, URAP also observed many intense waves at frequencies below that of the freely-propagating radio waves; these are described in the tutorial (to be available soon).

Jovian radio emissions on the day of the Ulysses fly-by