Multi-Instrument Observations of an Aurora-Type Event by Mars Express

摘要: We present a new set of observations Martian aurora obtained by SPICAM UV spectrometer on board Mars Express (MEX). Several auroral emissions are identified the night side near crustal magnetic fields. During several orbits consecutive events separated tens seconds observed, highlighting role closed and open field line structures in shaping spatially these events. For most coordinated with MARSIS ASPERA-3 were possible. is composed an ion mass analyzer (IMA), two neutral particle imager (NPI NPD) one electron (ELS). particular events, data from available so that simultaneous measurement precipitating flux was multifrequency synthetic aperture orbital sounding radar which monitors Total Electron Content (TEC) operating for some At end, UVS spectrograph covering spectral range between 110 300 nm measures atmospheric glow. It this latter instrument clearly provides evidence occurrence auroral-event. In order to avoid any ambiguity positions measurements, we used MEX during view nadir oriented. This shows quite strong coincidences energetic electrons into atmosphere, increase TEC, presence anomalies auroral-type Following definition Brain et al. (2007) / lines, observe detected occur lines. conclusion therefore suggests significant relation at cusp like structures.