GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 3.2 GNGTS 2024 Applicability of cheap and lightweight magnetc sensors to geophysical exploraton F. Accomando 1 and G. Florio 1 1 Dipartmento di Scienze della Terra, dell’Ambiente e delle Risorse – Università di Napoli “Federico II”, Italia. In recent years, there was a notable technological advancement in geophysical sensors. In the case of magnetometry, several sensors were used having the common feature to be miniaturized and lightweight, thus idoneous to be carried by UAV in drone-borne magnetometric surveys. Moreover, such sensors have the common feature to be very cheap, so that it is in principle very easy to have the resources to combine two or three of them to form gradiometers. Nonetheless, another common feature is that their sensitvity ranges from 0.1 to about 200 nT, thus not comparable to that of alkali vapor, standard fux-gate or even proton magnetometers. However, their low-cost, small volume and weight remain as very interestng features of these sensors. In this communicaton, we want to explore the range of applicatons of small tri-axial magnetometers commonly used for attude determinaton in several devices. We compare the results of ground- based surveys performed with conventonal geophysical instruments with those obtained using these sensors. Corresponding author: flippo.accomando@unina.it