Compensation of interference in airborne electromagnetic systems and solution of the problem of relative positioning in the electromagnetic two-dipoles field
Abstract:
The solution of the problem of relative positioning of the alternating magnetic field transmitter and the receiver is to determine the radius vector between the objects under consideration and their mutual orientation. In this paper, algorithms for the relative positioning of two dipoles in an electromagnetic field in three-dimensional and two-dimensional formulations are considered. The results obtained during the processing of real data from the airborne electromagnetic system EM4H are compared. Compensation has been carried out by measuring of two dipoles for the EQUATOR and “ЕМ4Н” airborne electromagnetic systems in several modifications: with a transmitter loop attached to the fuselage of a Mi-8 helicopter, with a loop attached to the fuselage of an An-3 aircraft, and with a loop towed by a Eurocopter AS350B3. A comparison with the traditional method of compensation based on measurements of the field of three dipoles has been caried out. The signals remaining after interference compensation have been analyzed. It has been shown that the quality of compensation in the field of two dipoles is equatable to the traditional one.
Keywords:relative positioning, alternating magnetic field, transmitter, receiver, compensation, magnetic dipole
UDC:
527.62+ 519.24 BBK:
30в6
Received: October 17, 2023 Published: January 31, 2024
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