Advancing magnetometer calibration: a sequential tri-axis approach

Abstract This paper presents a comparative study on the calibration of magnetometer sensors, focusing on three methods: the least square method, the ellipsoid fitting method, and a proposed sequential method. The effectiveness of the first two methods is investigated, and their results are compared with the outcomes achieved through the application of the sequential method. Practical data is utilized to demonstrate the advantages of the proposed method. Through this research, insights are provided into the performance and limitations of the least square and ellipsoid fitting methods, while highlighting the superior capabilities of the sequential method. The results show that the sequential method inherits the capabilities of both method and leads to a more reliable calibration.