Research on the received signal correction technique of ground-airborne frequency-domain electromagnetic

Ground-airborne frequency-domain electromagnetic (GAFEM) is an important method of detecting electrical information about subsurface materials (Lin et al., 2019). The method requires the manual emission of a known frequency-domain signal. The signal is received by a magnetic sensor and then processed to obtain useful information. However, with the development of magnetic detection technology and data processing methods, the current receiving system sensor position acquisition is not accurate enough, which will affect the final data processing result. The current detection method will make the received electromagnetic data contain motion and attitude noise. This paper addresses the noise generation mechanism and proposes a new data processing algorithm to systematically solve the above problems. Finally, the effectiveness of the method in this paper is verified by practical tests.