2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5605GAIA observations of eclipsing binary stars will have a large impact on stellar astrophysics. Accurate parameters, including absolute masses and sizes will be derived for $\sim 10^4$ systems, orders of magnitude more than what has ever been done from the ground. Observations of 18 real systems in the GAIA-like mode as well as with devoted ground-based campaigns are used to assess binary recognition techniques, orbital period determination, accuracy of derived fundamental parameters and the need to automate the whole reduction and interpretation process.10 pages, 6 figures; to be published in GAIA spectroscopy, Science and Technology, ASP Conference Series, U.Munari (ed.)Astrophysicstext