 This creates noticeable gaps in the belts' spatial distribution and affects the decimetric synchrotron radiation.In fact, the existence of Jupiter's rings was first hypothesized on the basis of data from the "Pioneer 11" spacecraft, which detected a sharp drop in the number of high-energy ions close to the planet.The planetary magnetic field strongly influences the motion of sub-micrometer ring particles as well, which acquire an electrical charge under the influence of solar ultraviolet radiation.