HGG has a GCM system (DUALEM421S), which can be operated on land or water. The GCM system operates at a frequency of 9000 Hz, and has vertical and horizontal receiver coils at distances of 1, 2 and 4 meter from the transmitter, respectively. The instrument makes a unique measurement 10 times per second and can be operated by boat, walking or towed behind a motorized vehicle. A GPS, which is connected to the system, ensures detailed positioning of the measurements.
The acquisition of GPS and GCM data is controlled by in-house developed software which ensures data synchronization and easy in-field data evaluation. The GPS positions is linked to a navigation software running on the build in PC. Mapping lines can be plotted and visualized, to make sure that the desired line spacing and areal coverage is obtained.
HGG have built several of the acquisition systems. Please enquire for possibilities and read more under Workshop.
Test of minimum distance between ATV and GPS - pdf
Christiansen, AV, Pedersen, JB, Auken, E, Soe, NE, Holst, MK & Kristiansen, SM 2016, 'Improved Geoarchaeological Mapping with Electromagnetic Induction Instruments from Dedicated Processing and Inversion', Remote Sensing, bind 8, nr. 12, 1022. https://doi.org/10.3390/rs8121022 - pdf
