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Abstract: The problem of retrieving atmospheric ozone from satellite-based spectrally resolved radiance in the -absorption band has been addressed in this paper. Different tools, statistical and physical, have been implemented and intercompared and their ability to retrieve total columnar ozone has been checked by further comparison with satellite UV sensors. The study has been based on a suitable set of interferometric monitoring of greenhouse gases, complemented with a set of co-located total columnar ozone observations from total ozone mapping spectrometer. [Copyright &y& Elsevier]

This paper describes a new fast line-by-line radiative transfer scheme which computes top of the atmosphere spectral radiance and its Jacobians with respect to any set of geophysical parameters both for clear and cloudy sky, and presents the software which implements the procedure. The performance of the code has been evaluated with respect to accuracy and speediness through a comparison with a state-of-art line-by-line radiative transfer model. The new code is well suited for nadir viewing satellite and airplane infrared sensors with a sampling rate in the range 0.1–2 cm−1. [Copyright &y& Elsevier]