Platform–corrected analyses of near-bottom magnetic data acquired by autonomous underwater vehicles

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ID: 322358
2026
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Abstract
Summary Autonomous underwater vehicles (AUVs) provide high-resolution magnetic measurements essential for investigating crustal accretion, tectonic segmentation, and hydrothermal processes at mid-ocean ridges. However, raw magnetometer measurements are strongly influenced by platform-induced magnetic fields, attitude-dependent biases, and navigation uncertainties that must be corrected to recover geophysically meaningful anomaly fields. We apply a procedure to measurements from AUVs which includes platform independent scalar calibration, transformation into geographic reference frames, spin-based removal of permanent and induced vehicle magnetization, and computation of magnetic anomalies relative to the International Geomagnetic Reference Field. The framework also incorporates a two-dimensional spectral upward continuation to reconcile altitude variations, thereby recovering anomalies at a uniform reference level. Application of this system to AUV datasets from the East Pacific Rise and Mid-Atlantic Ridge demonstrates effective suppression of platform biases, improved crossover consistency, and the generation of internally coherent geomagnetic anomaly fields suitable for subsequent analysis and mapping.
Reference Key
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Authors Vaibhav Vijay Ingale, Jeffrey Gee, Ross Parnell‑Turner
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Journal geophysical journal international
Year 2026
DOI
10.1093/gji/ggag279
URL
https://doi.org/10.1093/gji/ggag279
Keywords Keywords not found

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