GROUND-BASED OPTICAL OBSERVATIONS OF DAYTIME AURORAL EMISSIONS FROM ANTARCTICA

First results obtained from ground-based observations on daytime auror al emission intensities from the Indian station, Maitri, in Antarctica , are presented and discussed. These results show striking increases i n intensities in all the emissions (viz. low- and high-energy electron -induced and proton-induced emissions), during noon hours in a latitud inal region near the plasmapause and far from the conventional cusp zo ne. Wave-like disturbances are seen on moderately disturbed days in pr oton-induced emissions. Plausible causes for such enhancements and dis turbances are discussed.