PHOTOGRAMMETRY, LASER SCANNING, HOLOGRAPHY AND TERRESTRIAL SURVEYING OF THE NOTO VLBI DISH

In early Autumn 2005 both Medicina and Noto antennas were surveyed with the purpose of measuring the eccentricity vector between the co-located VLBI and GPS instruments. The survey were performed following the well established procedure successfully applied earlier to both radiotelescopes. Along with the usual terrestrial measurements performed for local tie purposes, laser scanning observations were performed on both telescopes. In particular, the internal part of the dishes were laser scanned at seven different elevations. In earlier years, the surface of the Noto dish had also been measured using photogrammetry and through ad hoc holographic campaigns. We describe surveys performed and describe the different data sets collected in Noto and currently available for combination.