OSIRIS limb scattered sunlight spectra are used to construct daily zonal mean radiance spectra in the spectral window from 346 to 376 nm. This window contains contains five BrO absorption features (the 5,0 to 1,0 bands) and spans 79 OSIRIS pixels. These are inverted using an Optimal Estimation retrieval to yield effective daily zonal mean BrO profiles from 16 to 36 km. Single‐profile precision and effective resolution are found to be about 30% and 3–5 km, respectively, throughout much of the retrieval range. Individual profile and monthly mean comparisons with ground‐based, balloon, and satellite instruments are found to agree to about 30%.
This retrieval is batch processed at Environment Canada every few months and transferred to the University of Saskatchewan. Data from November, 2001 to the current date are available for download in an OSIRIS Level 2 Product in HDF-EOS5 format. OSIRIS remains fully operational and processing of this algorithm will be maintained into the foreseeable future.
Figure taken from McLinden, C. A., et al. (2010), Odin/OSIRIS observations of stratospheric BrO: Retrieval methodology, climatology, and inferred Bry, J. Geophys. Res., 115, D15308, doi:10.1029/2009JD012488.