The two European satellite-borne atmospheric sensors Global Ozone Monitoring Experiment (GOME) and the SCanning Imaging Absorption spectrometer for Atmospheric CHartographY (SCIAMACHY) are currently operational and offer the potential for an assessment of the global total ozone distribution covering an expected time span of over 18 years.
The Royal Netherlands Meteorological Institute (KNMI) has developed two retrieval algorithms to derive the total ozone data from these two European satellite instruments. These two retrieval algorithms are the Total Ozone retrieval scheme for the GOME instrument based on the OMI DOAS algorithm (TOGOMI), and the corresponding application to the SCIAMACHY instrument (TOSOMI).
A new version (2.0) of these two retrieval algorithms has been prepared by KNMI staff, and the new total ozone data are distributed via internet from the Tropospheric Emission Monitoring Internet Service (TEMIS)