Vol. 16, issue 03, article # 14

Jacquinet-Husson N., Scott N.A., Chedin A., Chursin A.A. The GEISA spectroscopic database system updated for IASI (direct radiative transfer modeling). // Atmospheric and oceanic optics. 2003. V. 16. No. 03. P. 256-261.
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The performances of the second generation vertical sounders like AIRS (Atmospheric Infrared Sounder) in the USA, and IASI (Infrared Atmospheric Sounding Interferometer) in Europe, are highly dependent on the accuracy of spectroscopic parameters of the optically active atmospheric gases. In this context, since 1974, the ARA (Atmospheric Radiation Analysis) group at LMD (Laboratoire de Meteorologie Dynamique, France) has developed the GEISA (Gestion et Etude des Informations Spectroscopiques Atmospheriques: Management and Study of Atmospheric Spectroscopic Information) computer accessible database system to perform reliable radiative transfer calculations. The 2001 version of GEISA (further GEISA-01) and GEISA/IASI (GEISA version dedicated to the IASI experiment) are described. GEISA-01 database involves information on line transition parameters for 42 molecules (96 isotopic species) and contains 1 361 667 entries, between 0 and 22 656 cm-1.