Details of the abstract
|Title of paper||Archaeological prospecting using drone-towed electromagnetic and magnetic systems|
|List of authors||Vilhelmsen, T.|
|Affiliation(s)||Crustal Magnetism Technology and Research Group, DTU Space.|
Drone-borne magnetic and electromagnetic sensor systems solutions have gradually expanded their use within geophysical prospecting. Magnetic and electromagnetic sensors in a drone setup allow much movability compared to a standard handhold walking survey and will also downscale the cost and risk typically associated with helicopter-borne surveys. Hence, a drone-based solution seems very attractive for magnetic and electromagnetic prospecting and could potentially replace some of the existing setups.|
This abstract presents drone-towed magnetic and electromagnetic systems and datasets from the same area in the southern part of Denmark (Thy), where the magnetic data is a vertical magnetic gradient, and the electromagnetic data is the quadrature stacked response from a transmission frequency of 40025Hz, 65675Hz, and 91275Hz. The area is known for its prehistorical flint mines, and using both magnetic and electromagnetic data will provide a better background for mapping these. To further enhance and verify any archaeological structures, we will apply levelling, micro levelling and grid the data to make interpretation possible.
The sensors and drone are off-the-shelf products, but the arrangement and construction of the survey are unique. We towed the sensors in a 6 meters wire configuration underneath the drone to avoid electromagnetic interference and flew with 0.7m line spacing approximately 1 meter above the surface.
|Session Keyword||1.0 Instrumentation, sources and data processing|