Observations made with the WIC and the SI cameras make it thus possible to spectrally discriminate between the proton and electron FUV aurora. Data collected since early May 2000 show that all three instruments make very sensitive measurements with high spatial resolution even in the sunlit daytime cusp. It was demonstrated that the SI12 channel is capable for the first time to map the energetic protons.
Observations show that electron and proton precipitations roughly overlap.
Regions such as the pre-midnight low latitude sector where proton precipitation dominates may be separated from the electron component. These simultaneous measurements permit a comparison between the remotely imaged particle precipitation and the magnetic footprint measurements made along the low-altitude satellite track. The local and global precipitated energy fluxes of both protons and electrons estimated from both types of observations will be compared as well as the precipitation boundaries.