1887
Volume 39 Number 8
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

We propose an unmanned aerial system fully dedicated to magnetic surveying in a variety of contexts ranging from small and shallow objects or pipelines detection to large-scale geological mapping: the Easymag system. Four major requirements are identified if one wishes to efficiently acquire quality magnetic data at such variable scales: 1- the accuracy of the magnetic acquisition must be better than the lowest expected signal according to the application (usually a few nT or lower); 2- the navigation and positioning must be precise enough to compete with ground operators with centimetre accuracy; 3- the flight flexibility must allow contrasting flight domains with topographic draping at any height; 4- the efficiency on the field must compete with existing carriers. Each of these aspects are investigated to demonstrate Terremys’ ability to perform efficient magnetic surveys. As a first case study, a drone magnetic acquisition for archaeological purposes is presented in comparison with a ground survey of the same area. Ground and drone surveys can lead to similar results. To demonstrate the ability to acquire magnetic data in different flight domains with the same system, a second case study focusing on a multiscale analysis is presented.

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2021-08-01
2024-03-19
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