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The GEISA-IASI 2011 spectroscopic database
The GEISA-IASI database (Jacquinet-Husson et al. 1998) derives from GEISA.
GEISA-IASI has been created with the purpose of assessing the IASI
measurements capabilities, within the ISSWG (IASI Sounding Science Working Group), in the
framework 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, in
order to benefit as soon as possible from improvements in the knowledge of spectroscopic
parameters and to ensure their continuous upgrade and maintenance during the fifteen
years of life of the IASI instrument.
Since the launch, in 2006, of MetOp-A, first (of a series of three for 15 years) EPS polar-orbiting
satellite, GEISA-IASI is used as the reference spectroscopic database for IASI Level 1
Cal/Val activities, using the “4A” (Atlas Automatisé des Absorptions Atmosphériques) LMD (Scott, 1974 ; Scott and Chédin, 1981) radiative
transfer code in its operational release (4A/OP) distributed by Noveltis
Since its creation, GEISA-IASI has been issued four times: in 1997, 2001, 2003
(see Jacquinet-Husson et al. 2001, 2003, 2005) and in 2011 for the present new edition.
GEISA-IASI, is both: an extraction within the IASI (and AIRS, as well),
spectral range: 599 - 3001 cm-1 and a continuous update of GEISA 2011. The two databases
have a similar structure, comprising three independent sub-databases devoted respectively to:
Questions ?
- You will find the answers to the most current questions about our FAQ.
- For scientific questions, please contact Prof. Nicole Jacquinet-Husson :
Nicole.Jacquinet@lmd.polytechnique.fr
- For On line Web access questions, please Contact the webmaster :
Ether-webmaster@ipsl.jussieu.fr
REFERENCES
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