Last Friday Nov 20, the positions of the sensors placed inside the West End Building have heen measured and their VRS coordinates calculated. In total, 30 sensors have been surveyed, together the needed auxiliary reference points (Fig.1).
Tab.1 reports the final result and Fig.2 to Fig.5 some pictures of the survey carried out through the AT403 laser tracker. The measured point and the associated coordinates are referred to the center of the SMR sphere placed on the top of the yellow cover of the sensor (Fig.4 and 5), so about 140รท150 mm above the floor level (Z direction). The normalized offset of SMR center respect its support nest is 25 mm.
For the correct identification of each sensor, the ID point is the serial number reported on the existing label on top of the cover (Fig.3).
