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- W2316454508 abstract "Electromagnetic survey using an ocean bottom electro-magnetometer (OBEM) is very useful for the crustal structure survey. Electromagnetic data of higher frequency are important to detect the shallower structure for the magneto-telluric surveys and the controlled source survey on the sea floor. High accuracy magnetometer in the high frequency range is very important for marine MT surveys and the controlled source survey. We decided to develop the new suitable magnetometer with high performance in high frequency range. We made some prototype magnetometers with an improved fluxgate type, an induction coil type and a new magnetic-impedance (MI) type. To evaluate the frequency characteristic of each magnetometer, we carried out the parallel observation in the Kakioka magnetic observatory. In this operation, three prototype sensors and our present fluxgate sensor were set up in the Kakioka observatory and observed for 5 days. As a result, new fluxgate sensor shows better performance in the frequency range less than 1Hz. On the other hand, the noise level of a MI type magnetometer in the higher frequency range is lower. Induction coil type shows low noise level, however it has a heavy weight and long body." @default.
- W2316454508 created "2016-06-24" @default.
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- W2316454508 date "2013-01-15" @default.
- W2316454508 modified "2023-09-27" @default.
- W2316454508 title "Developing new magnetometer system for marine EM survey" @default.
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- W2316454508 doi "https://doi.org/10.1190/segj112013-086" @default.
- W2316454508 hasPublicationYear "2013" @default.
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