An Automatic Method to Estimate the Calibration Quality of the Aeromagnetic Compensation
Yizhen Wang, Qi Han, Kai Cheng Hu, Dechen Zhan · 2019
Aeromagnetic compensation is an effective technique to reduce magnetic interference of the aircraft during an aero-magnetic survey. As an important indicator to evaluate the compensation effect, the figure of merit (FOM) is widely applied. However, calculating FOM needs to label the maneuvers manually. In order to solve this problem, we propose an automatic method to calculate the FOM. This method labels the maneuvers through classifying the flight direction and recognizing the attitude by combining two clustering algorithms, k-means and Gaussian mixture model (GMM). The required magnetic fields are collected by a vector-magnetometer, which is commonly used during the magnetic surveys. Results of the tests demonstrate the availability of the proposed method.