This is a collection of my notes and initial results and doesn't represent presentation material.
Comments are welcome.
However, once the mean energy has been specified by the LBH ratio, the OI 1356 emission can be used as a direct diagnostic of total atomic oxygen column density. This opens the possibility of using UVI images as remote monitors of changes in the ratio of thermos- pheric O to N2 within the auroral regions. Initial results of this type of analysis will be presented along with discussion of its limitation and capabilities. It is found that regions of auroral activity as identified in UVI images correspond to regions of depletions of O relative to N2. Furthermore these depletions seem to be correlated with substorm onset, though this conclusion must be tempered by the fact that the substorm onset is changing rapidly and may not be properly analyzed using the image ratios.