Multi instrument study of the hourly pulsations in Saturn’s magnetosphere The in situ exploration of the magnetospheres of Jupiter and Saturn has revealed various pulsed phenomena some of them being periodic. In Saturns magnetosphere several studies have reported pulsations with a periodicity of around one hour in the measurements of charged particle fluxes plasma wave emissions magnetic field strength and auroral emission brightness. This thesis reports the first multi instrument study of these hourly pulsations using data sets of several instruments on board the Cassini spacecraft orbiting around Saturn since 2004. A 10 year survey of the quasi periodic ho...