At first, the option of Villafranca del Castillo (Madrid) was considered, where ESA already has a Space Astronomy Center (ESAC), but it was discarded due to its accelerated urban development, which would have been, without a doubt, a safe source of interference.
At first, Villafranca del Castillo (Madrid) was considered as a potential site for the Space Astronomy Center (ESAC), where ESA already has one, but it was rejected due to its significant urbanization, which would have guaranteed interference.