Research on Compensation Processing Method for Single Acquisition Channel Signal of Full Tensor SQUID Aeromagnetic Gradiometer
Qiao Yan-chao, Zhang Bao-gang,*, Gesang Puncog,*, Guo Hua, Qin Jing-xin, and Liu Jian-ying
1. State Key Laboratory of Remote Sensing and Digital Earth, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China
2. State Key Laboratory of Remote Sensing and Digital Earth, Beijing Normal University, Beijing, 100875, China
3. Geothermal Geological Team, Xizang Bureau of Geology and Mineral Exploration and Development, Lhasa, 850032, China
4. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing, 100083, China
Abstract Magnetic interference represents the primary constraint on data accuracy in aeromagnetic gradient measurements. Focusing on superconducting quantum interference devices (SQUIDs), this study develops a magnetic gradient data compensation method utilizing single-channel signals from SQUID aeromagnetic gradiometers. The approach initiates with calculating the Earth's background reference magnetic field, its gradient field, and temporal variation rate within the flight platform's coordinate system, enabling compensation correction for three-component magnetometer data. These compensated fields subsequently facilitate single-channel gradiometer data compensation; the processed gradient data then undergoes low-pass fi ltering and quality evaluation. This systematic compensation framework achieves a root mean square (RMS) of 16 pT/m with an improvement ratio (IR) of 2.3×103, eff ectively mitigating system and environmental noise across measurement platforms while signifi cantly enhancing compensation accuracy and reliability for SQUID aeromagnetic gradiometers.
About author: Gesang Puncog, graduated from Tongji University in 2007, majoring in Earth Exploration and Geothermal Geological, mainly responsible for the data processing and interpretation.
Cite this article:
. Research on Compensation Processing Method for Single Acquisition Channel Signal of Full Tensor SQUID Aeromagnetic Gradiometer[J]. APPLIED GEOPHYSICS, 2025, 22(4): 957-972.
2025, Vol. 22 
