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| | Abstract | | In deep-sea magnetic surveys using Autonomous Underwater Vehicles (AUVs), the attitude change strongly affects the calculated magnetic anomalies in addition to the vehicle's permanent and induced magnetic field. For that reason, in order to detect small-scale magnetic anomalies with small amplitudes, it is important to effectively correct the artificial magnetic field caused by the magnetization of vehicle body. AUV Yumeiruka was newly developed by JAMSTEC and is equipped with a canard-X rudder which makes it capable of controlling its attitude angles and keeping the vehicle in horizontal plane during the seafloor survey. With this function, it is expected to reduce the effect of the attitude change of vehicle body, a generally serious problem during the deep-sea magnetic survey by AUV. In this study, we conducted an experimental deep-sea magnetic survey using AUV Yumeiruka for the first time on the Bayonnaise knoll Caldera using the small-type 3-components fluxgate magnetometers mounted on the both side of AUV Yumeiruka. The results show the good quality of the magnetic data as well as the previous study with the other AUVs and we confirmed that AUV Yumeiruka is capable of carrying out detailed magnetic survey in hydrothermal areas. |
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