Aeromagnetic Compensation Algorithm Based on Calibration of Fluxgate Measurements

This paper discusses about a combined method of tri-axial fiuxgate parameter calibration scheme and aeromagnetic compensation algorithm. The aircraft's magnetic interference is a bottle-neck factor in obtaining high quality aeromagnetic data. According to Tolles-Lawson model, the accuracy of aircraft's directional cosines directly affects compensation quality. In this paper, a method of calibrating the fiuxgate magnetometer is introduced and then the calibration parameters obtained is used to aeromagnetic survey. With the help of calibrated fiuxgate magnetometer, an iterative aeromagnetic compensation algorithm is developed to enhance the ordinary aeromagnetic compensation method. Simulated experimental results show that the proposed scheme is viable to improve the compensation accuracy.