Abstract
The capabilities and deficiencies of the present system of operational satellites for retrieving energy and water balance parameters in the tropics are stressed on the basis of specific studies about the African climate performed in LMD : these studies concern the atmospheric phase of the cycle, and specifically convective systems, precipitations, winds and general circulation. It is shown that some improvements can still be made in the processing of existing data, but that more quantitative studies of such important processes as relationships between precipitations, latent heat release and tropical circulations, or cloud-radiation interactions, would require more dedicated space missions, with appropriate instrument groupings.
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