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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Three-dimensional resistivity modeling of GREATEM survey data from Ontake Volcano, northwest Japan

Fig. 2

Modified from Abd Allah et al. (2013a)

Overview of the grounded electrical-source airborne transient electromagnetic (GREATEM) system. The towed bird contains the three-component magnetometer, gyro, directional MI sensor and GPS sensor. The data logger has a 24-bit AD converter, SSD memory and a high-precision clock synchronized with the transmitter-control clock in the towed container. The secondary magnetic field induced in accordance with the ground resistivity was recorded during current ‘on’ and ‘off’ times.

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