FIELD: measurement equipment.
SUBSTANCE: invention relates to geophysical measurements by means of an aircraft. Essence of the invention is as follows: a system for electromagnetic geophysical survey in time domain (TDEM) to obtain a B-field measurement result includes a transmitter coil, a compensating coil located in concentric and coplanar orientation relative to the transmitter coil, a receiver coil located in concentric and coplanar orientation relative to the compensating coil, an electrical current source connected to the transmitter coil and the compensating coil for supply to them of periodic current, and a data collection system intended to receive a dB/dt signal of a time derivative of a magnetic field from the receiver coil and to integrate the dB/dt signal for generation of the measurement result of the magnetic B-field. Multiple radial ropes pass radially outwards from the central point to the corresponding points of the frame of the transmitter coil, the frame of the compensating coil and the frame of the receiver coil, each of which is connected to radial ropes. The transmitter coil, the compensating coil and the receiver coil are located relative to each other so that in the place of the receiver coil the magnetic field generated by the compensating coil has a cancelling influence on the primary magnetic field generated by the transmitter coil.
EFFECT: improvement of measurement quality.
20 cl, 6 dwg
