An OFG SCM was deployed on the Hugin AUV used by NTNU in their summer 2016 MarMine seafloor massive sulphide (SMS) research project. We look forward to continued collaboration on subsea magnetic and electromagnetic systems in support of the NTNU MarMine project for seafloor minerals exploration and research. For further information on the NTNU MarMine project please visit their site https://www.ntnu.edu/igb/marmine.
Ocean Floor Geophysics (OFG) offers the only Self-Compensating Magnetometer (SCM) system that can operate with the sensor mounted inside an Autonomous Underwater Vehicle (AUV) to acquire high resolution, high quality magnetic data that is automatically compensated and corrected to remove the effects of the vehicle on the magnetic data.
Magnetic data is an essential mapping tool for geological, mineral, military, archeological, geotechnical, resource, and environmental applications. However, a magnetometer when installed inside an AUV, records the magnetic field of these features and is often overwhelmed by the heading- and attitude-dependent magnetic fields of the vehicle. Magnetometers can be mounted away from the AUV with specialized mounting apparatuses (e.g. a towed body or pole mounts), but at the cost of increased complication to launch and recovery operations and risk to vehicle safety. To produce useful data from a magnetometer mounted inside the body of an AUV, it is necessary to compensate not only for the attitude of the AUV in the earth's field, but also for secondary effects related to the strength of the electric currents flowing in the vehicle propulsion and vehicle control circuits.
OFG has solved this problem by developing the patent-pending OFG SCM--a system containing procedures and software that correct and compensate for the internal magnetic field caused by the heading, attitude, and electric current effects of the AUV.
For further information on the OFG SCM for AUVS and ROVs, please visithttp://www.oceanfloorgeophysics.com/ofg-scm/