ABSTRACT
Plate 27. Geophysical survey at Aiali-test site. From top left: GPS SIR 3000; GSSI Terravision (Geostudi Astier); Helmut Becker using the magnetometer GEM Overhouser; Foerster DLG Kartograph multi-probe gradiometer; fi eld lecture; survey with the electomagnetometer EM-31; setting up the electomagnetometer EM-38 before survey; EM-38 survey; Gianfranco Morelli processing the ERT data; Michel Dabas setting up the geoelectrical instrument (syscal-pro); Michel Dabas explaining fi eld data acquisition to a group of students; differential GPS and total station survey; Helmut Becker Scintrex Smartmag SM4G-special system in various sensor confi gurations (portable and trolley); Automatic Resistivity Profi ler (ARP© Terranova). (See colour plate section)
Each test area has been assigned to one student’s group and has been investigated, during the different days, employing four different geophysical methods: Magnetometry (fl uxgate and Overhouser gradiometers, Cesium optical pumping magnetometer), Ground Penetration Radar (GPR), inductive ElectroMagnetic (EM), Electrical Resistivity Tomography (ERT). This means that each student’s group has had the opportunity to employ all different geophysical methods in the same area for the location of the same archaeological features (Plate 27).
