In December, 2009 through January, 2010, there was a concerted campaign to study
the auroral acceleration region (AAR) by the Cluster mission. This period
presented the first, albeit brief, opportunity for a full, multi-spacecraft
investigation deep into the nightside AAR. The Wideband Data (WBD) instrument,
in coordination with the other Cluster instruments, targeted various wave
phenomena for study, including auroral kilometric radiation (AKR), electrostatic
solitary structures and auroral hiss, observing at frequencies from 100 Hz to
577 kHz (although not with full coverage). We will present an overview of the
first results of these wave investigations. Since multi-spacecraft measurements
were made both along the same field lines and along near-identical spacecraft
tracks (with minute-scale time lags), we will emphasize the spatial and temporal
variation of the observed features. We will also compare to similar AAR
observations made in late spring of 2009, when the spacecraft passed through the
acceleration region at higher altitudes, but at more poleward latitudinal
positions.