An equivalent source method for removal of attitude-induced responses in drone-towed magnetic scalar gradiometry data

SUMMARY Drone-towed scalar field gradiometry surveys conducted in windy conditions or under self-excited oscillations generate attitude-induced responses that can hinder the geological interpretation. Here, we present a gradiometric equivalent source method (GESM) to remove these by interpolating and continuing measured data new idealized pseudo-sensor positions free of any attitude deviations. In addition, transverse horizontal difference (THD) from precisely positioned drone-towed survey collected Nautanen, northern Sweden. Analysing Nautanen survey’s positional revealed gradiometer system exhibited directional-dependent yaw deviations with periods unpredictable Based on synthetic THD created using data, manifest as line-to-line striping short-wavelength maps. Applying GESM removes satisfactory accuracy compared true values. Furthermore, actual applying improved continuity anomalies, significantly improving interpretation data. The results suggest surveys, given precise information via an onboard GNSS-IMU system, maintains high quality even when surveying high-gradient areas. including processing ensures high-quality