The GEISA/IASI database derives from GEISA. GEISA/IASI is elaborated with the purpose of assessing the IASI measurements capabilities, within the ISSWG (IASI Sounding Science Working Group), in the frame of the CNES (Centre National d'Etudes Spatiales, France)/EUMETSAT (EUropean organization for the exploitation of METeorological SATellites) European Polar System (EPS) preparation, by simulating high resolution radiance spectra and/or experimental data. To benefit as soon as possible from improvements in the knowledge of spectroscopic parameters and to ensure the continuous upgrade and maintenance of GEISA/IASI during the fifteen years of life of the IASI instrument, EUMETSAT and CNES have created the GEISA/IASI Database Scientific Committee (GIDSC). EUMETSAT is planning to implement GEISA/IASI into the EPS ground segment.
Since its creation, GEISA/IASI has been issued three times: in 1997, in 2001 and in 2003.
GEISA/IASI, in its 2003 edition, is both, an extraction within the IASI or AIRS spectral range (599 - 3001 cm-1) and a continuous update of GEISA-03, with a similar structure, comprising three independent sub-databases devoted respectively to:
- individual line transition spectroscopic parameters
- infrared absorption cross-sections
- micro-physical and optical properties of atmospheric aerosols
Detailed content of the GEISA/IASI-03 spectroscopic database:
The GEISA/IASI-03 database (pdf)
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GEISA