  From the 27th to the 28th January 2009, the Cassini spacecraft remotely
acquired combined observations of Saturns southern aurorae at radio,
ultraviolet and infrared wavelengths, while monitoring ion injections in the
middle magnetosphere from energetic neutral atoms. Simultaneous measurements
included the sampling of a full planetary rotation, a relevant timescale to
investigate auroral emissions driven by processes internal to the
magnetosphere. In addition, this interval coincidently matched a powerful
substorm-like event in the magnetotail, which induced an overall dawnside
intensification of the magnetospheric and auroral activity. We comparatively
analyze this unique set of measurements to reach a comprehensive view of
kronian auroral processes over the investigated timescale. We identify three
source regions in atmospheric aurorae, including a main oval associated with
the bulk of Saturn Kilometric Radiation (SKR), together with polar and
equatorward emissions. These observations reveal the co-existence of
corotational and sub-corototational dynamics of emissions associated with the
main auroral oval. Precisely, we show that the atmospheric main oval hosts
short-lived sub-corotating isolated features together with a bright,
longitudinally extended, corotating region locked at the southern SKR phase. We
assign the susbtorm-like event to a regular, internally driven, nightside ion
injection possibly triggerred by a plasmoid ejection. We also investigate the
total auroral energy budget, from the power input to the atmosphere,
characterized by precipitating electrons up to 20 keV, to its dissipation
through the various radiating processes. Finally, through simulations, we
confirm the search-light nature of the SKR rotational modulation and we show
that SKR arcs relate to isolated auroral spots. The resulting findings are
discussed in the frame of pending questions.
