Feasibility Study for an Autonomous UAV -Magnetometer System -- Final Report on SERDP SEED 1509:2206

Versteeg, Roelof; McKay, Mark; Anderson, Matthew; Johnson, Ross; Selfridge, Bob; Bennett, Jay

doi:10.2172/923485

Cited by 1 publication

(2 citation statements)

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“…Rotary-wing UAVs are more recent, more maneuverable and require a very small space for take-off and landing. However, their range is often small (e.g., several km), and they fly at low speeds, typically 10 m/s (Roelof et al, 2007;Eck and Imbach, 2012;Stoll, 2013;Macharet et al, 2016;Malehmir et al, 2017;Parvar et al, 2017;Cunningham et al, 2018;Parshin et al, 2018;Walter et al, 2018, Walter et al, 2020.…”

Section: Introductionmentioning

confidence: 99%

“…Scalar magnetometers are often used on board UAVs despite their size and weight, which prevents the use of small UAVs, such as rotary-wing UAVs. Proton precession magnetometers (Malehmir et al, 2017;Parshin et al, 2018) or optically pumped magnetometers are generally preferred (Roelof et al, 2007;Caron et al, 2014;Wood et al, 2016;Parvar et al, 2017;Cunningham et al, 2018;Walter et al, 2018, Walter et al, 2020. These magnetometers allow precise and absolute measurements of the magnetic field intensity and the magnetometer is often towed below the UAV to reduce the magnetic field of the UAV.…”

Section: Introductionmentioning

confidence: 99%

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Aerial magnetic mapping with an unmanned aerial vehicle and a fluxgate magnetometer: a new method for rapid mapping and upscaling from the field to regional scale

Maire

Bertrand

Munschy

et al. 2020

Geophysical Prospecting

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Magnetic measurements with an unmanned aerial vehicle (UAV) are ideal for filling the gap between ground and airborne magnetic surveying. However, to obtain accurate aeromagnetic data, the compensation of magnetic effects of the UAV is a challenge. Typically, scalar magnetometers are towed several metres under the UAV to minimize its magnetic field. In this study, a fluxgate three-component magnetometer is attached 42 cm in front of the UAV at the tip of a composite pipe. Using a scalar calibration, the sensor can be calibrated, and the permanent and induced magnetic fields of the UAV can be compensated. The contributions of the magnetic measurements at different altitudes to the UAV results were tested over an area of 1 km² in the Northern Vosges Mountains. The area is located in a hamlet surrounded by a forest where few geological outcrops are observed. Three magnetic surveys of the same area are obtained at different altitudes: 100, 30 and 1 m above the ground (AGL). The UAV magnetic data are compared to a helicopter aeromagnetic survey at 300 m AGL and a ground magnetic survey using upward continuations of the maps to compare the results. The magnetic maps (300, 100, 30 and 1 m AGL) show very different magnetic anomaly patterns (e.g., amplitude, shape, wavelength and orientation). The magnetic data at different altitudes improve the understanding of the geology from the local to more general scales.

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