Within Exupéry the operational GOME-2 total column SO2 product provided by the German Aerospace Center (DLR) is used. The operational level 1-to-2 processing of the SO2 product is performed with UPAS (Universal Processor for Atmospheric Spectrometers), a new generation system for the processing of operational trace gas and cloud property products in near-real time and off-line (Livschitz and Loyola 2003), available at http://wdc.dlr.de/sensors/gome2/

The MODIS true colour images of NASA/GSFC, MODIS Rapid Response System (Gumley et al. 2010) can be found at http://rapidfire.sci.gsfc.nasa.gov/

The Fortran source code of FLEXTRA and FLEXPART (Stohl et al. 1998, Stohl et al. 1999, Stohl et al. 2005) and corresponding user manuals can be found at http://transport.nilu.no/flexpart

References

Gumley, L., Descloitres, J. and Schmaltz, J. (2010): Creating Reprojected True Color MODIS Images: A Tutorial. URL: http://rapidfire.sci.gsfc.nasa.gov/

Livschitz, Y. and Loyola, D. (2003): Design Document for the GOME-2 Universal Processor for Atmospheric Spectrometers, SAF/O3M/DLR/DD/001, Issue 2.0, October 2003

Stohl, A., Hittenberger, M. and Wotawa, G. (1998): Validation of the Lagrangian particle dispersion model FLEXPART against large scale tracer experiment data, Atmospheric Environment 32: 4245-4264

Stohl, A., Haimberger, L., Scheele, M., and Wernli, H. (1999): An intercomparison of results from three trajectory models, Meteorological Applications 8:127–135

Stohl, A., Foster,C., Frank,A., Seibert,P., and Wotawa,G. (2005): Technical note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmospheric Chemistry and  Physics 5: 2461-2474