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Assessment of ACE-FTS H20 isotopologue amounts

Molecules with identical chemical, but different isotopic composition, are known as isotopologues. Several isotopologues of H2O present in the Earth's atmosphere can be retrieved with the satellite instrument ACE-FTS on SCISAT. In this talk, I will describe my intercomparison work on water isotopologues with a heavy oxygen atom (Oxygen-17 and Oxygen-18). The main part of this study is a comparison with the satellite instrument SMR on Odin.