Statistical study of NEIAL occurence in the PFISR data and correlated auroral forms

Naturally Enhanced Ion Acoustic Lines (NEIALs) have been observed wth the Poker Flat Incoherent Scatter Radar (PFISR) ever since it began operating in 2006. The first few years of PFISR operation corresponded to a long, geomagnetically quiet solar minimum. During this time there were only a limited number of NEIALs observed with PFISR with simultaneous auroral imaging. The increases in solar activity that started occurring in 2011 and 2012 have resulted in significantly more active auroral structures over the PFISR radar at Poker Flat, AK. The increase in auroral activity has resulted in a large number of NEIALs observed with PFISR. The MOOSE imagers have been operating continuously since September 2011 and have made many auroral observations simultaneous to the PFISR observations of NEIALs. The larger number of NEIAL observations available now, make it possible to distinguish the range of auroral features that are associated with different aspects of the NEIAL observations. We aim to statistically catagorize the different types of auroral features that occur with NEIALs in the PFISR data, with the goal of gaining insight into the possible generation mechanisms of NEIALs.; PFISR electron density measurements (in 10^11 m^-3) showing strong NEIAL enhancements extending to greater than 700 km altitudes. ; All-sky image from 22 January 2012, showing tall rayed auroral structures at a time of strong NEIALs in the PFISR data.