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The MagDrone R4 is an ultra light weight magnetometer with 5 triaxial Fluxgates to be attached to any UAV capable to carry 2 kg of payload.
In opposite to the MagDrone R3, the MagDrone R4 is used for high resolution mapping in order to detect small and compact objects as well as structures in the ground, such as UXO or archaeological features.
Note, that general rule with magnetometer when it is necessary to detect artificial objects or artefacts - fly as low as possible. Recommended altitude for the tasks like UXO search - 1m above surface or even lower. That means that drone should be equipped with terrain following system (included in recommended magnetometer bundle).
UXO/landmines detection note
The system is capable to detect a range of items starting from hand grenades (the estimated sensor-target distance for detecting an object such as the F1 hand grenade is 0.5 m) till big UXO like aerial bombs at the distance of few meters.
While magnetometers can detect some types of landmines (for example M15, M6, TM-62M anti-tank mines; M16, PROM-1, OZM-3, OZM-4, OZM-72 anti-personnel mines and similar types with considerable amounts of ferrous metal), landmines search is not a direct application of magnetometers as they can’t detect most types of modern landmines. That means that the system never should be used to confirm absence of landmines (and small ordnance) in certain area but it can be valuable asset during Non-Technical Survey (NTS) or Technical Survey (TS) to confirm presence of UXO/landmines with considerable amount of ferrous metals.