Introduction
The Ozone Monitoring Instrument (OMI) is the Dutch-Finnish contribution to the NASA EOS-AURA mission, which is scheduled for launch in June 2003. OMI is an imaging spectrometer that measures in the spectral range between 270 and 500 nm. OMI combines a relatively high spatial resolution (13x24 km? at nadir) with daily global coverage. From the radiance spectra measured by OMI, total columns of gases like ozone, NO2, BrO and SO2 will be derived. Also, cloud and aerosol parameters will be determined from the OMI measurements.
