High-resolution in situ electron measurements combined with conjugate multi-spectral auroral imaging

The ISINGLASS sounding rocket campaign provided an opportunity to make multi-spectral auroral imaging observations combined with high-resolution in situ electron measurements. We present observations from this campaign where 6 independent optical imagers were operated, which allowed for all-sky field of view observations to be made at 3 different wavelengths (427.8 , 557.7 and 844.6 nm) with 3 frames per second. The other three imagers were operated with this same filter combination and 47 degree fields of view at 16 frames per second to provide higher resolution detail of the auroral structure and dynamics. The precipitating electron distribution was measured with 10 ms time resolution enabling simultaneous comparisons between the precipitating electrons and the optical auroral features observed at the rocket payload footpoint. The ratios of auroral intensities will be used, in combination with GLOW modeling, to predict the 2-dimensional structure of the precipitating electron energy and energy flux. This also makes it possible to estimate the Pedersen and Hall conductivities over the imager fields of view. The spectral and spatial characteristics of the optical auroral features will be examined in the context of the structure and characteristics observed in the corresponding precipitating electrons in order to investigate the effects of ionospheric conductivity in generating small-scale structure in the optical aurora.