abstract
The general behaviour of the OI emissions at 6300 and 5577?, as well as the N2+ emission at 4278?, are discussed. The results concerning the twilight and midnight enhancements are reviewed. It is concluded that apart from the auroral enhancement near midnight due to the diurnal excursion of the auroral oval, there is a prevailing precipitation of soft electrons which may be related to the position of Sanae with regard to the southern radiation anomaly.