Vertical gradient of the geomagnetic field by multiple altitude aeromagnetic survey

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Modern geophysical survey technologies are progressing fast. One notable milestone of this progress is substantial increase of georeferencing performance with benefits of advanced satellite radionavigation. This article delves into the advantages of employing multiple altitude (also referred to as multilevel) aeromagnetic measurements conducted using unmanned aerial vehicles for deriving vertical gradient. This approach contrasts with conventional methods that rely on the calculation of the corresponding transform of the anomalous magnetic field. A comparative analysis was conducted on two study areas, characterized by distinct magnetic anomalies. One region exhibited strong anthropogenic disturbances against a background of a relatively calm regional magnetic field, while the other demonstrated weaker anthropogenic anomalies. The comparison between the maps of the anomalous field gradient calculated directly and derived from multilevel survey in both regions underscores the potential benefits of straightforward gradient measurement methods.

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作者简介

I. Aleshin

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences; Geophysical Center of the Russian Academy of Sciences

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Email: ima@ifz.ru
俄罗斯联邦, Moscow; Moscow

A. Soloviev

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences; Geophysical Center of the Russian Academy of Sciences

Email: ima@ifz.ru

Corresponding Member of the RAS

俄罗斯联邦, Moscow; Moscow

K. Kholodkov

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences; Geophysical Center of the Russian Academy of Sciences

Email: ima@ifz.ru
俄罗斯联邦, Moscow; Moscow

F. Perederina

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences; Geophysical Center of the Russian Academy of Sciences

Email: ima@ifz.ru
俄罗斯联邦, Moscow; Moscow

Ya. Taran

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences

Email: ima@ifz.ru
俄罗斯联邦, Moscow

参考

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2. Fig. 1. Comparison of the results of processing and transformation of the anomalous field of the altitude aeromagnetic survey. For the VlSU test site, panels A1, B1 and C1 show maps of the anomalous magnetic field (panel A1), the numerical vertical derivative of the field (panel B1) and the one calculated based on the results of the altitude survey (panel C1), respectively. For the Mikhnevo test site, similar maps are presented on panels A2, B2 and C2

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