ABSTRACT Magnetic surveys for geophysical interpretation will most usefully furnish estimates of the three components of the magnetic field vector. We review methods for obtaining this information based on scalar and tensor magnetic field measurements and point out the advantages of fluxgate vector measurements. Fluxgate vector magnetometers can be powerful instruments in magnetic mapping. The main problems in using fluxgate magnetometers arise from calibration errors and drift but these can be overcome using a quick and simple method of calibration. This method also has the advantage of compensating permanent and induced magnetic fields generated by the airplane. This is illustrated by a new aeromagnetic survey flown in the Vosges area (France). Measurement accuracy is shown to be similar to that obtained with scalar magnetometers. We take advantage of this accuracy to calculate in the Fourier domain other magnetic functions from the total‐field anomaly, in particular, the magnetic gradient tensor is obtained without using any superconducting quantum devices. A similar approach is used to introduce a new magnetic anomaly tensor that is the equivalent of the pseudo‐gravity tensor. Maps presented in the last sections serve as an example to illustrate the various functions, the goal of the paper being to obtain magnetic vector data from the observations without first postulating the detailed nature of the sources.

Marc Munschy

Simon Fleury

Geophysical Prospecting

《地球物理勘探》出版了关于地球物理科学的最佳初级研究，因为它适用于地球资源的勘探、评估和开采。该杂志大量借鉴了石油和矿产勘探行业研究人员的贡献，具有非常实用的倾向。尽管该杂志为这些领域的工作人员之间的交流提供了一个有价值的论坛，但它也非常适合学术地球物理学的研究人员。

The journal 'Geophysical Prospecting' publishes high-quality research in the field of geophysical sciences, particularly relevant to the exploration, assessment, and extraction of earth resources. It draws extensively on contributions from researchers in the oil and mineral exploration industries, emphasizing practical applications. While it serves as a valuable forum for communication among professionals in these fields, it is also well-suited for researchers in academic geophysics.

《Geophysical Prospecting》杂志发表关于地球物理科学的高质量研究，特别适用于地球资源的勘探、评估和开采。该杂志广泛吸纳了石油和矿产勘探领域研究人员的贡献，具有很强的实用性。虽然它为这些领域的专业人士提供了一个宝贵的交流平台，但同样也适合学术地球物理学的研究者。

Category	Quartile
地球科学	3
地球科学, 地球化学与地球物理	3

Scalar, vector, tensor magnetic anomalies: measurement or computation?

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Journal Info

Category	Quartile
GEOCHEMISTRY & GEOPHYSICS	3