Details of the Abstract
| Title of paper | Making use of the horizontal magnetic dipole transmitters to improve AMT data quality within the 500 Hz – 5 kHz dead band |
| List of authors | Epishkin, D., Yakovlev, A. |
| Affiliation(s) | Schmidt Institute of Physics of the Earth RAS Moscow Russia, Moscow State University Moscow Russia |
| Summary |
Due to the properties of natural high-frequency EM fields there is an inherent problem of obtaining high-quality AMT data in the frequency band from about ~500 Hz to ~5 kHz. To solve this problem, we propose to use an additional artificial signal source when carrying out measurements using the AMT method. The source must be in the far-field zone and include several EM field polarizations. In this case, it becomes possible to obtain better data quality while remaining within the framework of the regular AMT method. In the course of this work, we have developed an EM field source consisting of two horizontal magnetic dipoles oriented in the cardinal directions and creating several field polarizations, which allows tensor AMT measurements. The main features of the proposed transmitting system include the ease of its deployment, the relatively low required power of the generated signal, synchronization of the generated signal with the working schedule of the AMT station, and a fully automatic signal generation mode that does not require operator intervention during surveying. Field tests of the system have shown its effectiveness and superiority compared to horizontal electric dipoles in relatively conductive regions with resistivities of about ~100 Ωm or less. |
| Session Keyword | 1.0 Instrumentation, data acquisition and processing |
| File upload |
1.0_making_use_of_the_horizon_epishkin.pdf
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