The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The Galileo star sensor is heavily shielded from penetrating radiation to prevent false counts. Nevertheless in the inner jovian magnetosphere the penetrating radiation appears to be sufficiently strong that significant background counting rates are seen. The morphology and time variation of these background rates are consistent with the hypothesis that they are caused by energetic trapped particles...