  The GAUDI database (Ground-based Asteroseismology Uniform Database Interface,
http://sdc.laeff.esa.es/gaudi/) is a preparatory archive for the COROT
(COnvection, ROtation and planetary Transits,
http://www.astrsp-mrs.fr/projets/corot/) mission developed at LAEFF (Laboratory
for Space Astrophysics and Theoretical Physics, http://www.laeff.esa.es). Its
intention is to make the ground-based observations obtained in the preparation
of the asteroseismology programme available in a simple and efficient way. It
contains spectroscopic and photometric data together with inferred physical
parameters for more than 1500 objects gathered since January 1998 in 6 years of
observational campaigns. In this paper, the main functionalities and
characteristics of the system are described. The observations have been
collected at ESO-La Silla, Telescopio Nazionale Galileo, Observatoire de
Haute-Provence, South African Astronomical Observatory, Tautenberg Observatory
and Sierra Nevada Observatory.
