Gestion et Etude des Informations Spectroscopiques Atmosphériques
GEISA spectroscopic data bank was initiated in 1975 because atmospheric radiation analysis requires accurate description of spectral properties of atmospheric gases and particles.

Adequate tools are required to perform reliable radiative transfer modelling calculations to meet the needs of communities involved in understanding the atmospheres of the Earth and other planets. Among these tools compilations of spectroscopic parameters are used for a vast array of applications and especially for planetary atmospheric remote sensing. Consequently, there is an acute need for comprehensive, trustworthy and operational interactive spectroscopic databases to benefit the research in direct and inverse radiative transfer. In this context, since over three decades, the ARA (Atmospheric Radiation Analysis) group at LMD (Laboratoire de Météorologie Dynamique, France) has developed GEISA (Gestion et Etude des Informations Spectroscopiques Atmosphériques: Management and Study of Atmospheric Spectroscopic Information), a computer accessible database system (Chédin et al., (1982), Husson et al., (1992), Jacquinet-Husson et al., (1999, 2008, 2009, 2016), designed to facilitate accurate and fast forward, calculations of atmospheric radiative transfer using a line-by-line and (atmospheric) layer-by-layer approach. This effort has proven to be beneficial to the atmospheric scientific community participating in direct and inverse radiative transfer studies.

Gestion et Etude des Informations Spectroscopiques Atmosphériques
armante at lmd dot polytechnique dot fr
Chédin et al., (1982), Husson et al., (1992)
Mars Climate Database
MCD is the reference database produced at the LMD. It is labeled community code.

What is the Mars Climate Database?

The Mars Climate Database (MCD) aims at providing scientists, engineers and enthusiasts with a realistic and reliable modelisation of the martian climatological system.
The MCD is a database of meteorological fields derived from General Circulation Model (GCM) numerical simulations of the Martian atmosphere and validated using available observational data.
The GCM is developed at Laboratoire de Météorologie Dynamique du CNRS (Paris, France) in collaboration with the Open University (UK), the Oxford University (UK) and the Instituto de Astrofisica de Andalucia (Spain) with support from the European Space Agency (ESA) and the Centre National d’Etudes Spatiales (CNES).
The MCD is freely distributed and intended to be useful and used in the framework of engineering applications as well as in the context of scientific studies which require accurate knowledge of the state of the Martian atmosphere.

Mars Climate Database
forget at, millour at, spiga at
F. Forget, S. Lebonnois, E. Millour, A. Spiga, S. Guerlet

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