Autonomous-underwater-vehicle-based marine multicomponent self-potential method: observation scheme and navigational correction

Zhu, Zhongmin; Shen, Jinsong; Tao, Chunhui; Deng, Xianming; Wu, Tao; Nie, Zuofu; Wang, Wenyi; Su, Zhaoyang

Marine self-potential (SP) investigation is an effective method to study deep-sea hydrothermal vents and seafloor sulfide deposits. At present, one of the commonly used marine self-potential systems is a towed array of electrodes. Large noises are recorded when great changes in electrode distance and array attitude occur due to the complex seafloor topography. In this paper, a new multicomponent electrical field observation system based on an autonomous underwater vehicle (AUV) was introduced for the measurement of seafloor self-potential signals. The system was tested in a lake, and the multicomponent self-potential data were collected from there. Observed data involve the navigational information of the AUV, which could be corrected using a rotation transform. After navigational correction, measured data can recover the location of the artificial source using self-potential tomography. The experimental results showed that the new SP system can be applied to marine SP observations, providing an efficient and low-noise SP acquisition method for marine resources and environmental investigations.

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Zhu, Zhongmin / Shen, Jinsong / Tao, Chunhui / et al: Autonomous-underwater-vehicle-based marine multicomponent self-potential method: observation scheme and navigational correction. 2021. Copernicus Publications.

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