Total ozone data obtained by ADEOS/TOMS (Total Ozone Mapping Spectrometer) were compared with those by ground based observation. Both of the deviations were about 2%. ADEOS/TOMS data showed availability for Antarctic ozone hole and anomalous ozone depletion over the Arctic in 1997. We concluded that such high quality global total ozone data obtained by ADEOS/TOMS are necessary for analysis of ozone layer.
