J.-F. Oehler, V. Schifano, G. Marquis, H. Reiller, S. Lucas, C. Bougeault
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引用次数: 0
摘要
今天,随着自主潜水器的出现,在非常靠近目标源的地方,甚至在非常深的水域进行海洋磁力测量已成为现实。我们认为,成功的方法是将磁力计完全集成到自主潜水器上,并通过对地球磁场的三轴矢量测量来处理其静态磁噪声,即无人机的感应场和永久场。使用不同磁通门磁力传感器进行的三次磁力测量结果支持了这一论点,这些磁力传感器嵌入在不同大小的自主式水下航行器中。这些结果表明,根据航空磁场和卫星载体的发展情况,将简单的具体定义的优点系数与优化的标量校准程序相结合,就能从自主式水下航行器获得可靠的磁场测量结果,用于地球物理绘图或探测应用。结果令人印象深刻,表明即使自主式水下航行器的磁信号可能高出几个数量级,也能突出显示小于 10 nT 的弱磁异常。
Processing of unmanned underwater vehicle vector magnetometer data
Marine magnetometry very close to the targeted sources, even in very deep waters, is today a reality with the advent of autonomous underwater vehicles. We argue that a successful approach is to fully integrate the magnetometer onboard the autonomous underwater vehicle and to deal with its static magnetic noise, that is induced and permanent fields of the drone, with a 3-axis vector measurement of the Earth's magnetic field. This argument is supported by results from three magnetic surveys performed with different fluxgate magnetic sensors embedded in autonomous underwater vehicles of increasing sizes. They show that simple specifically defined figures of merit coupled to an optimized scalar calibration procedure derived from aeromagnetic and satellite-borne developments produce reliable magnetic measurements from autonomous underwater vehicles for geophysical mapping or detection applications. Results are impressive and show that even weak magnetic anomalies smaller than 10 nT can be highlighted even though the magnetic signatures of autonomous underwater vehicles can be orders of magnitude higher.
期刊介绍:
Geophysical Prospecting publishes the best in primary research on the science of geophysics as it applies to the exploration, evaluation and extraction of earth resources. Drawing heavily on contributions from researchers in the oil and mineral exploration industries, the journal has a very practical slant. Although the journal provides a valuable forum for communication among workers in these fields, it is also ideally suited to researchers in academic geophysics.